There are no descriptions for some enums, with produces lots
of warnings:

    drivers/media/platform/mtk-vcodec/venc/venc_vp8_if.c:55: warning: Enum value 'VENC_VP8_VPU_WORK_BUF_LUMA' not described in enum 'venc_vp8_vpu_work_buf'
    drivers/media/platform/mtk-vcodec/venc/venc_vp8_if.c:55: warning: Enum value 'VENC_VP8_VPU_WORK_BUF_LUMA2' not described in enum 'venc_vp8_vpu_work_buf'
    drivers/media/platform/mtk-vcodec/venc/venc_vp8_if.c:55: warning: Enum value 'VENC_VP8_VPU_WORK_BUF_LUMA3' not described in enum 'venc_vp8_vpu_work_buf'
    drivers/media/platform/mtk-vcodec/venc/venc_vp8_if.c:55: warning: Enum value 'VENC_VP8_VPU_WORK_BUF_CHROMA' not described in enum 'venc_vp8_vpu_work_buf'
    drivers/media/platform/mtk-vcodec/venc/venc_vp8_if.c:55: warning: Enum value 'VENC_VP8_VPU_WORK_BUF_CHROMA2' not described in enum 'venc_vp8_vpu_work_buf'
    drivers/media/platform/mtk-vcodec/venc/venc_vp8_if.c:55: warning: Enum value 'VENC_VP8_VPU_WORK_BUF_CHROMA3' not described in enum 'venc_vp8_vpu_work_buf'
    drivers/media/platform/mtk-vcodec/venc/venc_vp8_if.c:55: warning: Enum value 'VENC_VP8_VPU_WORK_BUF_MV_INFO' not described in enum 'venc_vp8_vpu_work_buf'
    drivers/media/platform/mtk-vcodec/venc/venc_vp8_if.c:55: warning: Enum value 'VENC_VP8_VPU_WORK_BUF_BS_HEADER' not described in enum 'venc_vp8_vpu_work_buf'
    drivers/media/platform/mtk-vcodec/venc/venc_vp8_if.c:55: warning: Enum value 'VENC_VP8_VPU_WORK_BUF_PROB_BUF' not described in enum 'venc_vp8_vpu_work_buf'
    drivers/media/platform/mtk-vcodec/venc/venc_vp8_if.c:55: warning: Enum value 'VENC_VP8_VPU_WORK_BUF_RC_INFO' not described in enum 'venc_vp8_vpu_work_buf'
    drivers/media/platform/mtk-vcodec/venc/venc_vp8_if.c:55: warning: Enum value 'VENC_VP8_VPU_WORK_BUF_RC_CODE' not described in enum 'venc_vp8_vpu_work_buf'
    drivers/media/platform/mtk-vcodec/venc/venc_vp8_if.c:55: warning: Enum value 'VENC_VP8_VPU_WORK_BUF_RC_CODE2' not described in enum 'venc_vp8_vpu_work_buf'
    drivers/media/platform/mtk-vcodec/venc/venc_vp8_if.c:55: warning: Enum value 'VENC_VP8_VPU_WORK_BUF_RC_CODE3' not described in enum 'venc_vp8_vpu_work_buf'
    drivers/media/platform/mtk-vcodec/venc/venc_vp8_if.c:55: warning: Enum value 'VENC_VP8_VPU_WORK_BUF_MAX' not described in enum 'venc_vp8_vpu_work_buf'
    drivers/media/platform/mtk-vcodec/venc/venc_h264_if.c:51: warning: Enum value 'VENC_H264_VPU_WORK_BUF_RC_INFO' not described in enum 'venc_h264_vpu_work_buf'
    drivers/media/platform/mtk-vcodec/venc/venc_h264_if.c:51: warning: Enum value 'VENC_H264_VPU_WORK_BUF_RC_CODE' not described in enum 'venc_h264_vpu_work_buf'
    drivers/media/platform/mtk-vcodec/venc/venc_h264_if.c:51: warning: Enum value 'VENC_H264_VPU_WORK_BUF_REC_LUMA' not described in enum 'venc_h264_vpu_work_buf'
    drivers/media/platform/mtk-vcodec/venc/venc_h264_if.c:51: warning: Enum value 'VENC_H264_VPU_WORK_BUF_REC_CHROMA' not described in enum 'venc_h264_vpu_work_buf'
    drivers/media/platform/mtk-vcodec/venc/venc_h264_if.c:51: warning: Enum value 'VENC_H264_VPU_WORK_BUF_REF_LUMA' not described in enum 'venc_h264_vpu_work_buf'
    drivers/media/platform/mtk-vcodec/venc/venc_h264_if.c:51: warning: Enum value 'VENC_H264_VPU_WORK_BUF_REF_CHROMA' not described in enum 'venc_h264_vpu_work_buf'
    drivers/media/platform/mtk-vcodec/venc/venc_h264_if.c:51: warning: Enum value 'VENC_H264_VPU_WORK_BUF_MV_INFO_1' not described in enum 'venc_h264_vpu_work_buf'
    drivers/media/platform/mtk-vcodec/venc/venc_h264_if.c:51: warning: Enum value 'VENC_H264_VPU_WORK_BUF_MV_INFO_2' not described in enum 'venc_h264_vpu_work_buf'
    drivers/media/platform/mtk-vcodec/venc/venc_h264_if.c:51: warning: Enum value 'VENC_H264_VPU_WORK_BUF_SKIP_FRAME' not described in enum 'venc_h264_vpu_work_buf'
    drivers/media/platform/mtk-vcodec/venc/venc_h264_if.c:51: warning: Enum value 'VENC_H264_VPU_WORK_BUF_MAX' not described in enum 'venc_h264_vpu_work_buf'
    drivers/media/platform/mtk-vcodec/venc/venc_h264_if.c:60: warning: Enum value 'H264_BS_MODE_SPS' not described in enum 'venc_h264_bs_mode'
    drivers/media/platform/mtk-vcodec/venc/venc_h264_if.c:60: warning: Enum value 'H264_BS_MODE_PPS' not described in enum 'venc_h264_bs_mode'
    drivers/media/platform/mtk-vcodec/venc/venc_h264_if.c:60: warning: Enum value 'H264_BS_MODE_FRAME' not described in enum 'venc_h264_bs_mode'
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

There are several of kernel-doc warnings:

    drivers/media/platform/davinci/vpif_display.c:114: warning: No description found for parameter 'sizes'
    drivers/media/platform/davinci/vpif_display.c:165: warning: No description found for parameter 'vq'
    drivers/media/platform/davinci/vpif_display.c:165: warning: Excess function parameter 'vb' description in 'vpif_start_streaming'
    drivers/media/platform/davinci/vpif_display.c:780: warning: No description found for parameter 'vpif_cfg'
    drivers/media/platform/davinci/vpif_display.c:780: warning: No description found for parameter 'chan_cfg'
    drivers/media/platform/davinci/vpif_display.c:780: warning: No description found for parameter 'index'
    drivers/media/platform/davinci/vpif_display.c:813: warning: No description found for parameter 'vpif_cfg'
    drivers/media/platform/davinci/vpif_display.c:813: warning: No description found for parameter 'ch'
    drivers/media/platform/davinci/vpif_display.c:813: warning: No description found for parameter 'index'
    drivers/media/platform/davinci/vpif_capture.c:121: warning: No description found for parameter 'sizes'
    drivers/media/platform/davinci/vpif_capture.c:174: warning: No description found for parameter 'vq'
    drivers/media/platform/davinci/vpif_capture.c:174: warning: Excess function parameter 'vb' description in 'vpif_start_streaming'
    drivers/media/platform/davinci/vpif_capture.c:636: warning: No description found for parameter 'iface'
    drivers/media/platform/davinci/vpif_capture.c:647: warning: No description found for parameter 'ch'
    drivers/media/platform/davinci/vpif_capture.c:647: warning: No description found for parameter 'muxmode'
    drivers/media/platform/davinci/vpif_capture.c:676: warning: No description found for parameter 'vpif_cfg'
    drivers/media/platform/davinci/vpif_capture.c:676: warning: No description found for parameter 'chan_cfg'
    drivers/media/platform/davinci/vpif_capture.c:676: warning: No description found for parameter 'input_index'
    drivers/media/platform/davinci/vpif_capture.c:712: warning: No description found for parameter 'vpif_cfg'
    drivers/media/platform/davinci/vpif_capture.c:712: warning: No description found for parameter 'ch'
    drivers/media/platform/davinci/vpif_capture.c:712: warning: No description found for parameter 'index'
    drivers/media/platform/davinci/vpif_capture.c:798: warning: No description found for parameter 'std'
    drivers/media/platform/davinci/vpif_capture.c:798: warning: Excess function parameter 'std_id' description in 'vpif_g_std'
    drivers/media/platform/davinci/vpif_capture.c:940: warning: No description found for parameter 'fmt'
    drivers/media/platform/davinci/vpif_capture.c:940: warning: Excess function parameter 'index' description in 'vpif_enum_fmt_vid_cap'
    drivers/media/platform/davinci/vpif_capture.c:1750: warning: No description found for parameter 'dev'

Fix them.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

There are some troubles on kernel-doc markups, as warned:

	drivers/media/v4l2-core/v4l2-dv-timings.c:259: warning: No description found for parameter 't1'
	drivers/media/v4l2-core/v4l2-dv-timings.c:259: warning: No description found for parameter 't2'
	drivers/media/v4l2-core/v4l2-dv-timings.c:259: warning: No description found for parameter 'pclock_delta'
	drivers/media/v4l2-core/v4l2-dv-timings.c:259: warning: No description found for parameter 'match_reduced_fps'
	drivers/media/v4l2-core/tuner-core.c:242: warning: bad line: internal parameters, like LNA mode
	drivers/media/v4l2-core/tuner-core.c:765: warning: No description found for parameter 'mode'
	drivers/media/v4l2-core/videobuf2-memops.c:127: warning: cannot understand function prototype: 'const struct vm_operations_struct vb2_common_vm_ops = '
	drivers/media/v4l2-core/v4l2-mem2mem.c:190: warning: No description found for parameter 'm2m_dev'
	drivers/media/v4l2-core/v4l2-mem2mem.c:291: warning: No description found for parameter 'm2m_ctx'
	drivers/media/v4l2-core/videobuf-core.c:233: warning: No description found for parameter 'q'
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

There are several parameters there that are named wrong, as
reported by those warnings:

	drivers/media/rc/ir-sharp-decoder.c:47: warning: No description found for parameter 'ev'
	drivers/media/rc/ir-sharp-decoder.c:47: warning: Excess function parameter 'duration' description in 'ir_sharp_decode'
	drivers/media/rc/ir-sanyo-decoder.c:56: warning: No description found for parameter 'ev'
	drivers/media/rc/ir-sanyo-decoder.c:56: warning: Excess function parameter 'duration' description in 'ir_sanyo_decode'
	drivers/media/rc/ir-xmp-decoder.c:43: warning: No description found for parameter 'ev'
	drivers/media/rc/ir-xmp-decoder.c:43: warning: Excess function parameter 'duration' description in 'ir_xmp_decode'
	drivers/media/rc/ir-jvc-decoder.c:47: warning: No description found for parameter 'ev'
	drivers/media/rc/ir-jvc-decoder.c:47: warning: Excess function parameter 'duration' description in 'ir_jvc_decode'
	drivers/media/rc/ir-lirc-codec.c:34: warning: No description found for parameter 'dev'
	drivers/media/rc/ir-lirc-codec.c:34: warning: No description found for parameter 'ev'
	drivers/media/rc/ir-lirc-codec.c:34: warning: Excess function parameter 'input_dev' description in 'ir_lirc_decode'
	drivers/media/rc/ir-lirc-codec.c:34: warning: Excess function parameter 'duration' description in 'ir_lirc_decode'
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

A new usbid of UTV007 is found in a newly bought device.

The usbid is 1f71:3301.

The ID on the chip is:
UTV007
A89029.1
1520L18K1

Both video and audio is tested with the modified usbtv driver.
Signed-off-by: NIcenowy Zheng <icenowy@aosc.io>
Acked-by: NLubomir Rintel <lkundrak@v3.sk>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

While it would be very cool to have those functions using
kernel-doc markups, the reality right now is that they
don't follow kernel-doc rules, as parameters aren't documented.

So, stop abusing on "/**" markups.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

The function documentation here doesn't follow kernel-doc,
as parameters aren't documented. So, stop abusing on
"/**" markups.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Some parameters aren't correctly identified, as noticed by
those warnings:
	drivers/media/rc/ir-nec-decoder.c:49: warning: No description found for parameter 'ev'
	drivers/media/rc/ir-nec-decoder.c:49: warning: Excess function parameter 'duration' description in 'ir_nec_decode'
	drivers/media/rc/ir-nec-decoder.c:189: warning: Excess function parameter 'raw' description in 'ir_nec_scancode_to_raw'
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

The comments that start with "/**" aren't kernel-doc stuff.
So, just start them with "/*".
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Cleanup those warnings:
	drivers/media/rc/rc-ir-raw.c:141: warning: No description found for parameter 'ev'
	drivers/media/rc/rc-ir-raw.c:141: warning: Excess function parameter 'type' description in 'ir_raw_event_store_with_filter'
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

There were some troubles there:
	drivers/media/dvb-core/dvb_frontend.c:379: warning: No description found for parameter 'fe'
	drivers/media/dvb-core/dvb_frontend.c:379: warning: No description found for parameter 'check_wrapped'
	drivers/media/dvb-core/dvb_frontend.c:1265: warning: No description found for parameter 'p_out'
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Constants documentation is not supported by kernel-doc markups.
So, change the comment label to avoid this warning:
	drivers/media/platform/davinci/vpif.c:54: warning: cannot understand function prototype: 'const struct vpif_channel_config_params vpif_ch_params[] = '
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Those drivers use a different notation for comments. While
it is not worth converting to kernel-doc, removing it is also
not an option.

So, just replace /** by /* and be happy :-)
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Needed to suppress the following warnings:
	drivers/media/rc/img-ir/img-ir-hw.c:351: warning: No description found for parameter 'reg_timings'
	drivers/media/rc/img-ir/img-ir-hw.c:351: warning: Excess function parameter 'timings' description in 'img_ir_decoder_convert'
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

The Siano driver doesn't use kernel-doc markups. While it
would be wanderful to convert to use it, it is probably
not worth the time.

So, instead of solving all problems there, just make
sure that it won't produce dozens of warnings.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Building the driver with gcc 7.2.1 and:
	make ARCH=i386  CF=-D__CHECK_ENDIAN__ CONFIG_DEBUG_SECTION_MISMATCH=y W=1 CHECK='' M=drivers/media

now produces a lot of warnings:
	drivers/media/rc/rc-main.c:278: warning: No description found for parameter 'new_keycode'
	drivers/media/rc/rc-main.c:278: warning: Excess function parameter 'keycode' description in 'ir_update_mapping'
	drivers/media/rc/rc-main.c:387: warning: No description found for parameter 'ke'
	drivers/media/rc/rc-main.c:387: warning: No description found for parameter 'old_keycode'
	drivers/media/rc/rc-main.c:387: warning: Excess function parameter 'scancode' description in 'ir_setkeycode'
	drivers/media/rc/rc-main.c:387: warning: Excess function parameter 'keycode' description in 'ir_setkeycode'
	drivers/media/rc/rc-main.c:433: warning: Excess function parameter 'to' description in 'ir_setkeytable'
	drivers/media/rc/rc-main.c:506: warning: No description found for parameter 'ke'
	drivers/media/rc/rc-main.c:506: warning: Excess function parameter 'scancode' description in 'ir_getkeycode'
	drivers/media/rc/rc-main.c:506: warning: Excess function parameter 'keycode' description in 'ir_getkeycode'
	drivers/media/rc/rc-main.c:634: warning: No description found for parameter 't'
	drivers/media/rc/rc-main.c:634: warning: Excess function parameter 'cookie' description in 'ir_timer_keyup'
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Building the driver with gcc 7.2.1 and:
	make ARCH=i386  CF=-D__CHECK_ENDIAN__ CONFIG_DEBUG_SECTION_MISMATCH=y W=1 CHECK='' M=drivers/media

now produces a lot of warnings:
	drivers/media/dvb-core/dvb_ca_en50221.c:233: warning: No description found for parameter 'ca'
	drivers/media/dvb-core/dvb_ca_en50221.c:233: warning: No description found for parameter 'slot'
	drivers/media/dvb-core/dvb_ca_en50221.c:284: warning: No description found for parameter 'timeout_hz'
	drivers/media/dvb-core/dvb_ca_en50221.c:284: warning: Excess function parameter 'timeout_ms' description in 'dvb_ca_en50221_wait_if_status'
	drivers/media/dvb-core/dvb_ca_en50221.c:409: warning: No description found for parameter 'tuple_type'
	drivers/media/dvb-core/dvb_ca_en50221.c:409: warning: No description found for parameter 'tuple_length'
	drivers/media/dvb-core/dvb_ca_en50221.c:409: warning: Excess function parameter 'tupleType' description in 'dvb_ca_en50221_read_tuple'
	drivers/media/dvb-core/dvb_ca_en50221.c:409: warning: Excess function parameter 'tupleLength' description in 'dvb_ca_en50221_read_tuple'
	drivers/media/dvb-core/dvb_ca_en50221.c:795: warning: No description found for parameter 'buf'
	drivers/media/dvb-core/dvb_ca_en50221.c:795: warning: No description found for parameter 'bytes_write'
	drivers/media/dvb-core/dvb_ca_en50221.c:795: warning: Excess function parameter 'ebuf' description in 'dvb_ca_en50221_write_data'
	drivers/media/dvb-core/dvb_ca_en50221.c:795: warning: Excess function parameter 'count' description in 'dvb_ca_en50221_write_data'
	drivers/media/dvb-core/dvb_ca_en50221.c:942: warning: No description found for parameter 'pubca'
	drivers/media/dvb-core/dvb_ca_en50221.c:942: warning: Excess function parameter 'ca' description in 'dvb_ca_en50221_camchange_irq'
	drivers/media/dvb-core/dvb_ca_en50221.c:970: warning: No description found for parameter 'pubca'
	drivers/media/dvb-core/dvb_ca_en50221.c:970: warning: Excess function parameter 'ca' description in 'dvb_ca_en50221_camready_irq'
	drivers/media/dvb-core/dvb_ca_en50221.c:990: warning: No description found for parameter 'pubca'
	drivers/media/dvb-core/dvb_ca_en50221.c:990: warning: Excess function parameter 'ca' description in 'dvb_ca_en50221_frda_irq'
	drivers/media/dvb-core/dvb_ca_en50221.c:1304: warning: No description found for parameter 'data'
	drivers/media/dvb-core/dvb_ca_en50221.c:1348: warning: No description found for parameter 'parg'
	drivers/media/dvb-core/dvb_ca_en50221.c:1348: warning: Excess function parameter 'inode' description in 'dvb_ca_en50221_io_do_ioctl'
	drivers/media/dvb-core/dvb_ca_en50221.c:1348: warning: Excess function parameter 'arg' description in 'dvb_ca_en50221_io_do_ioctl'
	drivers/media/dvb-core/dvb_ca_en50221.c:1432: warning: Excess function parameter 'inode' description in 'dvb_ca_en50221_io_ioctl'
	drivers/media/dvb-core/dvb_ca_en50221.c:1544: warning: No description found for parameter 'ca'
	drivers/media/dvb-core/dvb_ca_en50221.c:1544: warning: No description found for parameter 'result'
	drivers/media/dvb-core/dvb_ca_en50221.c:1544: warning: No description found for parameter '_slot'
	drivers/media/dvb-core/dvb_ca_en50221.c:1849: warning: No description found for parameter 'pubca'
	drivers/media/dvb-core/dvb_ca_en50221.c:1849: warning: Excess function parameter 'ca' description in 'dvb_ca_en50221_init'
	drivers/media/dvb-core/dvb_ca_en50221.c:1936: warning: No description found for parameter 'pubca'
	drivers/media/dvb-core/dvb_ca_en50221.c:1936: warning: Excess function parameter 'ca_dev' description in 'dvb_ca_en50221_release'
	drivers/media/dvb-core/dvb_ca_en50221.c:1936: warning: Excess function parameter 'ca' description in 'dvb_ca_en50221_release'

Trivially fix them.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

With all callbacks converted, and the timer callback prototype
switched over, the TIMER_FUNC_TYPE cast is no longer needed,
so remove it. Conversion was done with the following scripts:

    perl -pi -e 's|\(TIMER_FUNC_TYPE\)||g' \
        $(git grep TIMER_FUNC_TYPE | cut -d: -f1 | sort -u)

    perl -pi -e 's|\(TIMER_DATA_TYPE\)||g' \
        $(git grep TIMER_DATA_TYPE | cut -d: -f1 | sort -u)

The now unused macros are also dropped from include/linux/timer.h.
Signed-off-by: NKees Cook <keescook@chromium.org>

This converts all remaining setup_timer() calls that use a nested field
to reach a struct timer_list. Coccinelle does not have an easy way to
match multiple fields, so a new script is needed to change the matches of
"&_E->_timer" into "&_E->_field1._timer" in all the rules.

spatch --very-quiet --all-includes --include-headers \
	-I ./arch/x86/include -I ./arch/x86/include/generated \
	-I ./include -I ./arch/x86/include/uapi \
	-I ./arch/x86/include/generated/uapi -I ./include/uapi \
	-I ./include/generated/uapi --include ./include/linux/kconfig.h \
	--dir . \
	--cocci-file ~/src/data/timer_setup-2fields.cocci

@fix_address_of depends@
expression e;
@@

 setup_timer(
-&(e)
+&e
 , ...)

// Update any raw setup_timer() usages that have a NULL callback, but
// would otherwise match change_timer_function_usage, since the latter
// will update all function assignments done in the face of a NULL
// function initialization in setup_timer().
@change_timer_function_usage_NULL@
expression _E;
identifier _field1;
identifier _timer;
type _cast_data;
@@

(
-setup_timer(&_E->_field1._timer, NULL, _E);
+timer_setup(&_E->_field1._timer, NULL, 0);
|
-setup_timer(&_E->_field1._timer, NULL, (_cast_data)_E);
+timer_setup(&_E->_field1._timer, NULL, 0);
|
-setup_timer(&_E._field1._timer, NULL, &_E);
+timer_setup(&_E._field1._timer, NULL, 0);
|
-setup_timer(&_E._field1._timer, NULL, (_cast_data)&_E);
+timer_setup(&_E._field1._timer, NULL, 0);
)

@change_timer_function_usage@
expression _E;
identifier _field1;
identifier _timer;
struct timer_list _stl;
identifier _callback;
type _cast_func, _cast_data;
@@

(
-setup_timer(&_E->_field1._timer, _callback, _E);
+timer_setup(&_E->_field1._timer, _callback, 0);
|
-setup_timer(&_E->_field1._timer, &_callback, _E);
+timer_setup(&_E->_field1._timer, _callback, 0);
|
-setup_timer(&_E->_field1._timer, _callback, (_cast_data)_E);
+timer_setup(&_E->_field1._timer, _callback, 0);
|
-setup_timer(&_E->_field1._timer, &_callback, (_cast_data)_E);
+timer_setup(&_E->_field1._timer, _callback, 0);
|
-setup_timer(&_E->_field1._timer, (_cast_func)_callback, _E);
+timer_setup(&_E->_field1._timer, _callback, 0);
|
-setup_timer(&_E->_field1._timer, (_cast_func)&_callback, _E);
+timer_setup(&_E->_field1._timer, _callback, 0);
|
-setup_timer(&_E->_field1._timer, (_cast_func)_callback, (_cast_data)_E);
+timer_setup(&_E->_field1._timer, _callback, 0);
|
-setup_timer(&_E->_field1._timer, (_cast_func)&_callback, (_cast_data)_E);
+timer_setup(&_E->_field1._timer, _callback, 0);
|
-setup_timer(&_E._field1._timer, _callback, (_cast_data)_E);
+timer_setup(&_E._field1._timer, _callback, 0);
|
-setup_timer(&_E._field1._timer, _callback, (_cast_data)&_E);
+timer_setup(&_E._field1._timer, _callback, 0);
|
-setup_timer(&_E._field1._timer, &_callback, (_cast_data)_E);
+timer_setup(&_E._field1._timer, _callback, 0);
|
-setup_timer(&_E._field1._timer, &_callback, (_cast_data)&_E);
+timer_setup(&_E._field1._timer, _callback, 0);
|
-setup_timer(&_E._field1._timer, (_cast_func)_callback, (_cast_data)_E);
+timer_setup(&_E._field1._timer, _callback, 0);
|
-setup_timer(&_E._field1._timer, (_cast_func)_callback, (_cast_data)&_E);
+timer_setup(&_E._field1._timer, _callback, 0);
|
-setup_timer(&_E._field1._timer, (_cast_func)&_callback, (_cast_data)_E);
+timer_setup(&_E._field1._timer, _callback, 0);
|
-setup_timer(&_E._field1._timer, (_cast_func)&_callback, (_cast_data)&_E);
+timer_setup(&_E._field1._timer, _callback, 0);
|
 _E->_field1._timer@_stl.function = _callback;
|
 _E->_field1._timer@_stl.function = &_callback;
|
 _E->_field1._timer@_stl.function = (_cast_func)_callback;
|
 _E->_field1._timer@_stl.function = (_cast_func)&_callback;
|
 _E._field1._timer@_stl.function = _callback;
|
 _E._field1._timer@_stl.function = &_callback;
|
 _E._field1._timer@_stl.function = (_cast_func)_callback;
|
 _E._field1._timer@_stl.function = (_cast_func)&_callback;
)

// callback(unsigned long arg)
@change_callback_handle_cast
 depends on change_timer_function_usage@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._field1;
identifier change_timer_function_usage._timer;
type _origtype;
identifier _origarg;
type _handletype;
identifier _handle;
@@

 void _callback(
-_origtype _origarg
+struct timer_list *t
 )
 {
(
	... when != _origarg
	_handletype *_handle =
-(_handletype *)_origarg;
+from_timer(_handle, t, _field1._timer);
	... when != _origarg
|
	... when != _origarg
	_handletype *_handle =
-(void *)_origarg;
+from_timer(_handle, t, _field1._timer);
	... when != _origarg
|
	... when != _origarg
	_handletype *_handle;
	... when != _handle
	_handle =
-(_handletype *)_origarg;
+from_timer(_handle, t, _field1._timer);
	... when != _origarg
|
	... when != _origarg
	_handletype *_handle;
	... when != _handle
	_handle =
-(void *)_origarg;
+from_timer(_handle, t, _field1._timer);
	... when != _origarg
)
 }

// callback(unsigned long arg) without existing variable
@change_callback_handle_cast_no_arg
 depends on change_timer_function_usage &&
                     !change_callback_handle_cast@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._field1;
identifier change_timer_function_usage._timer;
type _origtype;
identifier _origarg;
type _handletype;
@@

 void _callback(
-_origtype _origarg
+struct timer_list *t
 )
 {
+	_handletype *_origarg = from_timer(_origarg, t, _field1._timer);
+
	... when != _origarg
-	(_handletype *)_origarg
+	_origarg
	... when != _origarg
 }

// Avoid already converted callbacks.
@match_callback_converted
 depends on change_timer_function_usage &&
            !change_callback_handle_cast &&
	    !change_callback_handle_cast_no_arg@
identifier change_timer_function_usage._callback;
identifier t;
@@

 void _callback(struct timer_list *t)
 { ... }

// callback(struct something *handle)
@change_callback_handle_arg
 depends on change_timer_function_usage &&
	    !match_callback_converted &&
            !change_callback_handle_cast &&
            !change_callback_handle_cast_no_arg@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._field1;
identifier change_timer_function_usage._timer;
type _handletype;
identifier _handle;
@@

 void _callback(
-_handletype *_handle
+struct timer_list *t
 )
 {
+	_handletype *_handle = from_timer(_handle, t, _field1._timer);
	...
 }

// If change_callback_handle_arg ran on an empty function, remove
// the added handler.
@unchange_callback_handle_arg
 depends on change_timer_function_usage &&
	    change_callback_handle_arg@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._field1;
identifier change_timer_function_usage._timer;
type _handletype;
identifier _handle;
identifier t;
@@

 void _callback(struct timer_list *t)
 {
-	_handletype *_handle = from_timer(_handle, t, _field1._timer);
 }

// We only want to refactor the setup_timer() data argument if we've found
// the matching callback. This undoes changes in change_timer_function_usage.
@unchange_timer_function_usage
 depends on change_timer_function_usage &&
            !change_callback_handle_cast &&
            !change_callback_handle_cast_no_arg &&
	    !change_callback_handle_arg@
expression change_timer_function_usage._E;
identifier change_timer_function_usage._field1;
identifier change_timer_function_usage._timer;
identifier change_timer_function_usage._callback;
type change_timer_function_usage._cast_data;
@@

(
-timer_setup(&_E->_field1._timer, _callback, 0);
+setup_timer(&_E->_field1._timer, _callback, (_cast_data)_E);
|
-timer_setup(&_E._field1._timer, _callback, 0);
+setup_timer(&_E._field1._timer, _callback, (_cast_data)&_E);
)

// If we fixed a callback from a .function assignment, fix the
// assignment cast now.
@change_timer_function_assignment
 depends on change_timer_function_usage &&
            (change_callback_handle_cast ||
             change_callback_handle_cast_no_arg ||
             change_callback_handle_arg)@
expression change_timer_function_usage._E;
identifier change_timer_function_usage._field1;
identifier change_timer_function_usage._timer;
identifier change_timer_function_usage._callback;
type _cast_func;
typedef TIMER_FUNC_TYPE;
@@

(
 _E->_field1._timer.function =
-_callback
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E->_field1._timer.function =
-&_callback
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E->_field1._timer.function =
-(_cast_func)_callback;
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E->_field1._timer.function =
-(_cast_func)&_callback
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E._field1._timer.function =
-_callback
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E._field1._timer.function =
-&_callback;
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E._field1._timer.function =
-(_cast_func)_callback
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E._field1._timer.function =
-(_cast_func)&_callback
+(TIMER_FUNC_TYPE)_callback
 ;
)

// Sometimes timer functions are called directly. Replace matched args.
@change_timer_function_calls
 depends on change_timer_function_usage &&
            (change_callback_handle_cast ||
             change_callback_handle_cast_no_arg ||
             change_callback_handle_arg)@
expression _E;
identifier change_timer_function_usage._field1;
identifier change_timer_function_usage._timer;
identifier change_timer_function_usage._callback;
type _cast_data;
@@

 _callback(
(
-(_cast_data)_E
+&_E->_field1._timer
|
-(_cast_data)&_E
+&_E._field1._timer
|
-_E
+&_E->_field1._timer
)
 )

// If a timer has been configured without a data argument, it can be
// converted without regard to the callback argument, since it is unused.
@match_timer_function_unused_data@
expression _E;
identifier _field1;
identifier _timer;
identifier _callback;
@@

(
-setup_timer(&_E->_field1._timer, _callback, 0);
+timer_setup(&_E->_field1._timer, _callback, 0);
|
-setup_timer(&_E->_field1._timer, _callback, 0L);
+timer_setup(&_E->_field1._timer, _callback, 0);
|
-setup_timer(&_E->_field1._timer, _callback, 0UL);
+timer_setup(&_E->_field1._timer, _callback, 0);
|
-setup_timer(&_E._field1._timer, _callback, 0);
+timer_setup(&_E._field1._timer, _callback, 0);
|
-setup_timer(&_E._field1._timer, _callback, 0L);
+timer_setup(&_E._field1._timer, _callback, 0);
|
-setup_timer(&_E._field1._timer, _callback, 0UL);
+timer_setup(&_E._field1._timer, _callback, 0);
|
-setup_timer(&_field1._timer, _callback, 0);
+timer_setup(&_field1._timer, _callback, 0);
|
-setup_timer(&_field1._timer, _callback, 0L);
+timer_setup(&_field1._timer, _callback, 0);
|
-setup_timer(&_field1._timer, _callback, 0UL);
+timer_setup(&_field1._timer, _callback, 0);
|
-setup_timer(_field1._timer, _callback, 0);
+timer_setup(_field1._timer, _callback, 0);
|
-setup_timer(_field1._timer, _callback, 0L);
+timer_setup(_field1._timer, _callback, 0);
|
-setup_timer(_field1._timer, _callback, 0UL);
+timer_setup(_field1._timer, _callback, 0);
)

@change_callback_unused_data
 depends on match_timer_function_unused_data@
identifier match_timer_function_unused_data._callback;
type _origtype;
identifier _origarg;
@@

 void _callback(
-_origtype _origarg
+struct timer_list *unused
 )
 {
	... when != _origarg
 }
Signed-off-by: NKees Cook <keescook@chromium.org>

This converts all remaining cases of the old setup_timer() API into using
timer_setup(), where the callback argument is the structure already
holding the struct timer_list. These should have no behavioral changes,
since they just change which pointer is passed into the callback with
the same available pointers after conversion. It handles the following
examples, in addition to some other variations.

Casting from unsigned long:

    void my_callback(unsigned long data)
    {
        struct something *ptr = (struct something *)data;
    ...
    }
    ...
    setup_timer(&ptr->my_timer, my_callback, ptr);

and forced object casts:

    void my_callback(struct something *ptr)
    {
    ...
    }
    ...
    setup_timer(&ptr->my_timer, my_callback, (unsigned long)ptr);

become:

    void my_callback(struct timer_list *t)
    {
        struct something *ptr = from_timer(ptr, t, my_timer);
    ...
    }
    ...
    timer_setup(&ptr->my_timer, my_callback, 0);

Direct function assignments:

    void my_callback(unsigned long data)
    {
        struct something *ptr = (struct something *)data;
    ...
    }
    ...
    ptr->my_timer.function = my_callback;

have a temporary cast added, along with converting the args:

    void my_callback(struct timer_list *t)
    {
        struct something *ptr = from_timer(ptr, t, my_timer);
    ...
    }
    ...
    ptr->my_timer.function = (TIMER_FUNC_TYPE)my_callback;

And finally, callbacks without a data assignment:

    void my_callback(unsigned long data)
    {
    ...
    }
    ...
    setup_timer(&ptr->my_timer, my_callback, 0);

have their argument renamed to verify they're unused during conversion:

    void my_callback(struct timer_list *unused)
    {
    ...
    }
    ...
    timer_setup(&ptr->my_timer, my_callback, 0);

The conversion is done with the following Coccinelle script:

spatch --very-quiet --all-includes --include-headers \
	-I ./arch/x86/include -I ./arch/x86/include/generated \
	-I ./include -I ./arch/x86/include/uapi \
	-I ./arch/x86/include/generated/uapi -I ./include/uapi \
	-I ./include/generated/uapi --include ./include/linux/kconfig.h \
	--dir . \
	--cocci-file ~/src/data/timer_setup.cocci

@fix_address_of@
expression e;
@@

 setup_timer(
-&(e)
+&e
 , ...)

// Update any raw setup_timer() usages that have a NULL callback, but
// would otherwise match change_timer_function_usage, since the latter
// will update all function assignments done in the face of a NULL
// function initialization in setup_timer().
@change_timer_function_usage_NULL@
expression _E;
identifier _timer;
type _cast_data;
@@

(
-setup_timer(&_E->_timer, NULL, _E);
+timer_setup(&_E->_timer, NULL, 0);
|
-setup_timer(&_E->_timer, NULL, (_cast_data)_E);
+timer_setup(&_E->_timer, NULL, 0);
|
-setup_timer(&_E._timer, NULL, &_E);
+timer_setup(&_E._timer, NULL, 0);
|
-setup_timer(&_E._timer, NULL, (_cast_data)&_E);
+timer_setup(&_E._timer, NULL, 0);
)

@change_timer_function_usage@
expression _E;
identifier _timer;
struct timer_list _stl;
identifier _callback;
type _cast_func, _cast_data;
@@

(
-setup_timer(&_E->_timer, _callback, _E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, &_callback, _E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, _callback, (_cast_data)_E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, &_callback, (_cast_data)_E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, (_cast_func)_callback, _E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, (_cast_func)&_callback, _E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, (_cast_func)_callback, (_cast_data)_E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, (_cast_func)&_callback, (_cast_data)_E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, (_cast_data)_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, (_cast_data)&_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, &_callback, (_cast_data)_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, &_callback, (_cast_data)&_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, (_cast_func)_callback, (_cast_data)_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, (_cast_func)_callback, (_cast_data)&_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, (_cast_func)&_callback, (_cast_data)_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, (_cast_func)&_callback, (_cast_data)&_E);
+timer_setup(&_E._timer, _callback, 0);
|
 _E->_timer@_stl.function = _callback;
|
 _E->_timer@_stl.function = &_callback;
|
 _E->_timer@_stl.function = (_cast_func)_callback;
|
 _E->_timer@_stl.function = (_cast_func)&_callback;
|
 _E._timer@_stl.function = _callback;
|
 _E._timer@_stl.function = &_callback;
|
 _E._timer@_stl.function = (_cast_func)_callback;
|
 _E._timer@_stl.function = (_cast_func)&_callback;
)

// callback(unsigned long arg)
@change_callback_handle_cast
 depends on change_timer_function_usage@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._timer;
type _origtype;
identifier _origarg;
type _handletype;
identifier _handle;
@@

 void _callback(
-_origtype _origarg
+struct timer_list *t
 )
 {
(
	... when != _origarg
	_handletype *_handle =
-(_handletype *)_origarg;
+from_timer(_handle, t, _timer);
	... when != _origarg
|
	... when != _origarg
	_handletype *_handle =
-(void *)_origarg;
+from_timer(_handle, t, _timer);
	... when != _origarg
|
	... when != _origarg
	_handletype *_handle;
	... when != _handle
	_handle =
-(_handletype *)_origarg;
+from_timer(_handle, t, _timer);
	... when != _origarg
|
	... when != _origarg
	_handletype *_handle;
	... when != _handle
	_handle =
-(void *)_origarg;
+from_timer(_handle, t, _timer);
	... when != _origarg
)
 }

// callback(unsigned long arg) without existing variable
@change_callback_handle_cast_no_arg
 depends on change_timer_function_usage &&
                     !change_callback_handle_cast@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._timer;
type _origtype;
identifier _origarg;
type _handletype;
@@

 void _callback(
-_origtype _origarg
+struct timer_list *t
 )
 {
+	_handletype *_origarg = from_timer(_origarg, t, _timer);
+
	... when != _origarg
-	(_handletype *)_origarg
+	_origarg
	... when != _origarg
 }

// Avoid already converted callbacks.
@match_callback_converted
 depends on change_timer_function_usage &&
            !change_callback_handle_cast &&
	    !change_callback_handle_cast_no_arg@
identifier change_timer_function_usage._callback;
identifier t;
@@

 void _callback(struct timer_list *t)
 { ... }

// callback(struct something *handle)
@change_callback_handle_arg
 depends on change_timer_function_usage &&
	    !match_callback_converted &&
            !change_callback_handle_cast &&
            !change_callback_handle_cast_no_arg@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._timer;
type _handletype;
identifier _handle;
@@

 void _callback(
-_handletype *_handle
+struct timer_list *t
 )
 {
+	_handletype *_handle = from_timer(_handle, t, _timer);
	...
 }

// If change_callback_handle_arg ran on an empty function, remove
// the added handler.
@unchange_callback_handle_arg
 depends on change_timer_function_usage &&
	    change_callback_handle_arg@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._timer;
type _handletype;
identifier _handle;
identifier t;
@@

 void _callback(struct timer_list *t)
 {
-	_handletype *_handle = from_timer(_handle, t, _timer);
 }

// We only want to refactor the setup_timer() data argument if we've found
// the matching callback. This undoes changes in change_timer_function_usage.
@unchange_timer_function_usage
 depends on change_timer_function_usage &&
            !change_callback_handle_cast &&
            !change_callback_handle_cast_no_arg &&
	    !change_callback_handle_arg@
expression change_timer_function_usage._E;
identifier change_timer_function_usage._timer;
identifier change_timer_function_usage._callback;
type change_timer_function_usage._cast_data;
@@

(
-timer_setup(&_E->_timer, _callback, 0);
+setup_timer(&_E->_timer, _callback, (_cast_data)_E);
|
-timer_setup(&_E._timer, _callback, 0);
+setup_timer(&_E._timer, _callback, (_cast_data)&_E);
)

// If we fixed a callback from a .function assignment, fix the
// assignment cast now.
@change_timer_function_assignment
 depends on change_timer_function_usage &&
            (change_callback_handle_cast ||
             change_callback_handle_cast_no_arg ||
             change_callback_handle_arg)@
expression change_timer_function_usage._E;
identifier change_timer_function_usage._timer;
identifier change_timer_function_usage._callback;
type _cast_func;
typedef TIMER_FUNC_TYPE;
@@

(
 _E->_timer.function =
-_callback
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E->_timer.function =
-&_callback
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E->_timer.function =
-(_cast_func)_callback;
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E->_timer.function =
-(_cast_func)&_callback
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E._timer.function =
-_callback
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E._timer.function =
-&_callback;
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E._timer.function =
-(_cast_func)_callback
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E._timer.function =
-(_cast_func)&_callback
+(TIMER_FUNC_TYPE)_callback
 ;
)

// Sometimes timer functions are called directly. Replace matched args.
@change_timer_function_calls
 depends on change_timer_function_usage &&
            (change_callback_handle_cast ||
             change_callback_handle_cast_no_arg ||
             change_callback_handle_arg)@
expression _E;
identifier change_timer_function_usage._timer;
identifier change_timer_function_usage._callback;
type _cast_data;
@@

 _callback(
(
-(_cast_data)_E
+&_E->_timer
|
-(_cast_data)&_E
+&_E._timer
|
-_E
+&_E->_timer
)
 )

// If a timer has been configured without a data argument, it can be
// converted without regard to the callback argument, since it is unused.
@match_timer_function_unused_data@
expression _E;
identifier _timer;
identifier _callback;
@@

(
-setup_timer(&_E->_timer, _callback, 0);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, _callback, 0L);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, _callback, 0UL);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, 0);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, 0L);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, 0UL);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_timer, _callback, 0);
+timer_setup(&_timer, _callback, 0);
|
-setup_timer(&_timer, _callback, 0L);
+timer_setup(&_timer, _callback, 0);
|
-setup_timer(&_timer, _callback, 0UL);
+timer_setup(&_timer, _callback, 0);
|
-setup_timer(_timer, _callback, 0);
+timer_setup(_timer, _callback, 0);
|
-setup_timer(_timer, _callback, 0L);
+timer_setup(_timer, _callback, 0);
|
-setup_timer(_timer, _callback, 0UL);
+timer_setup(_timer, _callback, 0);
)

@change_callback_unused_data
 depends on match_timer_function_unused_data@
identifier match_timer_function_unused_data._callback;
type _origtype;
identifier _origarg;
@@

 void _callback(
-_origtype _origarg
+struct timer_list *unused
 )
 {
	... when != _origarg
 }
Signed-off-by: NKees Cook <keescook@chromium.org>

This mechanically converts all remaining cases of ancient open-coded timer
setup with the old setup_timer() API, which is the first step in timer
conversions. This has no behavioral changes, since it ultimately just
changes the order of assignment to fields of struct timer_list when
finding variations of:

    init_timer(&t);
    f.function = timer_callback;
    t.data = timer_callback_arg;

to be converted into:

    setup_timer(&t, timer_callback, timer_callback_arg);

The conversion is done with the following Coccinelle script, which
is an improved version of scripts/cocci/api/setup_timer.cocci, in the
following ways:
 - assignments-before-init_timer() cases
 - limit the .data case removal to the specific struct timer_list instance
 - handling calls by dereference (timer->field vs timer.field)

spatch --very-quiet --all-includes --include-headers \
	-I ./arch/x86/include -I ./arch/x86/include/generated \
	-I ./include -I ./arch/x86/include/uapi \
	-I ./arch/x86/include/generated/uapi -I ./include/uapi \
	-I ./include/generated/uapi --include ./include/linux/kconfig.h \
	--dir . \
	--cocci-file ~/src/data/setup_timer.cocci

@fix_address_of@
expression e;
@@

 init_timer(
-&(e)
+&e
 , ...)

// Match the common cases first to avoid Coccinelle parsing loops with
// "... when" clauses.

@match_immediate_function_data_after_init_timer@
expression e, func, da;
@@

-init_timer
+setup_timer
 ( \(&e\|e\)
+, func, da
 );
(
-\(e.function\|e->function\) = func;
-\(e.data\|e->data\) = da;
|
-\(e.data\|e->data\) = da;
-\(e.function\|e->function\) = func;
)

@match_immediate_function_data_before_init_timer@
expression e, func, da;
@@

(
-\(e.function\|e->function\) = func;
-\(e.data\|e->data\) = da;
|
-\(e.data\|e->data\) = da;
-\(e.function\|e->function\) = func;
)
-init_timer
+setup_timer
 ( \(&e\|e\)
+, func, da
 );

@match_function_and_data_after_init_timer@
expression e, e2, e3, e4, e5, func, da;
@@

-init_timer
+setup_timer
 ( \(&e\|e\)
+, func, da
 );
 ... when != func = e2
     when != da = e3
(
-e.function = func;
... when != da = e4
-e.data = da;
|
-e->function = func;
... when != da = e4
-e->data = da;
|
-e.data = da;
... when != func = e5
-e.function = func;
|
-e->data = da;
... when != func = e5
-e->function = func;
)

@match_function_and_data_before_init_timer@
expression e, e2, e3, e4, e5, func, da;
@@
(
-e.function = func;
... when != da = e4
-e.data = da;
|
-e->function = func;
... when != da = e4
-e->data = da;
|
-e.data = da;
... when != func = e5
-e.function = func;
|
-e->data = da;
... when != func = e5
-e->function = func;
)
... when != func = e2
    when != da = e3
-init_timer
+setup_timer
 ( \(&e\|e\)
+, func, da
 );

@r1 exists@
expression t;
identifier f;
position p;
@@

f(...) { ... when any
  init_timer@p(\(&t\|t\))
  ... when any
}

@r2 exists@
expression r1.t;
identifier g != r1.f;
expression e8;
@@

g(...) { ... when any
  \(t.data\|t->data\) = e8
  ... when any
}

// It is dangerous to use setup_timer if data field is initialized
// in another function.
@script:python depends on r2@
p << r1.p;
@@

cocci.include_match(False)

@r3@
expression r1.t, func, e7;
position r1.p;
@@

(
-init_timer@p(&t);
+setup_timer(&t, func, 0UL);
... when != func = e7
-t.function = func;
|
-t.function = func;
... when != func = e7
-init_timer@p(&t);
+setup_timer(&t, func, 0UL);
|
-init_timer@p(t);
+setup_timer(t, func, 0UL);
... when != func = e7
-t->function = func;
|
-t->function = func;
... when != func = e7
-init_timer@p(t);
+setup_timer(t, func, 0UL);
)
Signed-off-by: NKees Cook <keescook@chromium.org>

Without this test, sir_ir clumsy claims resources for a device which
does not exist.

The 0-day kernel test robot reports the following errors (in a loop):
	sir_ir sir_ir.0: Trapped in interrupt
	genirq: Flags mismatch irq 4. 00000000 (ttyS0) vs. 00000000 (sir_ir)

When sir_ir is loaded with the default io and irq, the following happens:
 - sir_ir claims irq 4
 - user space opens /dev/ttyS0
 - in serial8250_do_startup(), some setup is done for ttyS0, which causes
   irq 4 to fire (in THRE test)
 - sir_ir does not realise it was not for it, and spins until the "trapped
   in interrupt"
 - now serial driver calls setup_irq() and fails and we get the
   "Flags mismatch" error.

There is no port present at 0x3e8 so simply check for the presence of a
port, as suggested by Linus.
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Tested-by: NFengguang Wu <fengguang.wu@intel.com>
Signed-off-by: NSean Young <sean@mess.org>
Cc: <stable@vger.kernel.org> # 4.12+
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Make wait_on_atomic_t() pass the TASK_* mode onto its action function as an
extra argument and make it 'unsigned int throughout.

Also, consolidate a bunch of identical action functions into a default
function that can do the appropriate thing for the mode.

Also, change the argument name in the bit_wait*() function declarations to
reflect the fact that it's the mode and not the bit number.

[Peter Z gives this a grudging ACK, but thinks that the whole atomic_t wait
should be done differently, though he's not immediately sure as to how]
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Acked-by: NPeter Zijlstra <peterz@infradead.org>
cc: Ingo Molnar <mingo@kernel.org>

dvb_frontend_invoke_release() may free the frontend struct.
So, the free logic can't update it anymore after calling it.

That's OK, as __dvb_frontend_free() is called only when the
krefs are zeroed, so nobody is using it anymore.

That should fix the following KASAN error:

The KASAN report looks like this (running on kernel 3e0cc09a (4.14-rc5+)):
==================================================================
BUG: KASAN: use-after-free in __dvb_frontend_free+0x113/0x120
Write of size 8 at addr ffff880067d45a00 by task kworker/0:1/24

CPU: 0 PID: 24 Comm: kworker/0:1 Not tainted 4.14.0-rc5-43687-g06ab8a23e0e6 #545
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
Workqueue: usb_hub_wq hub_event
Call Trace:
 __dump_stack lib/dump_stack.c:16
 dump_stack+0x292/0x395 lib/dump_stack.c:52
 print_address_description+0x78/0x280 mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351
 kasan_report+0x23d/0x350 mm/kasan/report.c:409
 __asan_report_store8_noabort+0x1c/0x20 mm/kasan/report.c:435
 __dvb_frontend_free+0x113/0x120 drivers/media/dvb-core/dvb_frontend.c:156
 dvb_frontend_put+0x59/0x70 drivers/media/dvb-core/dvb_frontend.c:176
 dvb_frontend_detach+0x120/0x150 drivers/media/dvb-core/dvb_frontend.c:2803
 dvb_usb_adapter_frontend_exit+0xd6/0x160 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:340
 dvb_usb_adapter_exit drivers/media/usb/dvb-usb/dvb-usb-init.c:116
 dvb_usb_exit+0x9b/0x200 drivers/media/usb/dvb-usb/dvb-usb-init.c:132
 dvb_usb_device_exit+0xa5/0xf0 drivers/media/usb/dvb-usb/dvb-usb-init.c:295
 usb_unbind_interface+0x21c/0xa90 drivers/usb/core/driver.c:423
 __device_release_driver drivers/base/dd.c:861
 device_release_driver_internal+0x4f1/0x5c0 drivers/base/dd.c:893
 device_release_driver+0x1e/0x30 drivers/base/dd.c:918
 bus_remove_device+0x2f4/0x4b0 drivers/base/bus.c:565
 device_del+0x5c4/0xab0 drivers/base/core.c:1985
 usb_disable_device+0x1e9/0x680 drivers/usb/core/message.c:1170
 usb_disconnect+0x260/0x7a0 drivers/usb/core/hub.c:2124
 hub_port_connect drivers/usb/core/hub.c:4754
 hub_port_connect_change drivers/usb/core/hub.c:5009
 port_event drivers/usb/core/hub.c:5115
 hub_event+0x1318/0x3740 drivers/usb/core/hub.c:5195
 process_one_work+0xc73/0x1d90 kernel/workqueue.c:2119
 worker_thread+0x221/0x1850 kernel/workqueue.c:2253
 kthread+0x363/0x440 kernel/kthread.c:231
 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431

Allocated by task 24:
 save_stack_trace+0x1b/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459
 kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551
 kmem_cache_alloc_trace+0x11e/0x2d0 mm/slub.c:2772
 kmalloc ./include/linux/slab.h:493
 kzalloc ./include/linux/slab.h:666
 dtt200u_fe_attach+0x4c/0x110 drivers/media/usb/dvb-usb/dtt200u-fe.c:212
 dtt200u_frontend_attach+0x35/0x80 drivers/media/usb/dvb-usb/dtt200u.c:136
 dvb_usb_adapter_frontend_init+0x32b/0x660 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:286
 dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:86
 dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:162
 dvb_usb_device_init+0xf73/0x17f0 drivers/media/usb/dvb-usb/dvb-usb-init.c:277
 dtt200u_usb_probe+0xa1/0xe0 drivers/media/usb/dvb-usb/dtt200u.c:155
 usb_probe_interface+0x35d/0x8e0 drivers/usb/core/driver.c:361
 really_probe drivers/base/dd.c:413
 driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
 __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
 bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
 __device_attach+0x26b/0x3c0 drivers/base/dd.c:710
 device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
 bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
 device_add+0xd0b/0x1660 drivers/base/core.c:1835
 usb_set_configuration+0x104e/0x1870 drivers/usb/core/message.c:1932
 generic_probe+0x73/0xe0 drivers/usb/core/generic.c:174
 usb_probe_device+0xaf/0xe0 drivers/usb/core/driver.c:266
 really_probe drivers/base/dd.c:413
 driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
 __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
 bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
 __device_attach+0x26b/0x3c0 drivers/base/dd.c:710
 device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
 bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
 device_add+0xd0b/0x1660 drivers/base/core.c:1835
 usb_new_device+0x7b8/0x1020 drivers/usb/core/hub.c:2457
 hub_port_connect drivers/usb/core/hub.c:4903
 hub_port_connect_change drivers/usb/core/hub.c:5009
 port_event drivers/usb/core/hub.c:5115
 hub_event+0x194d/0x3740 drivers/usb/core/hub.c:5195
 process_one_work+0xc73/0x1d90 kernel/workqueue.c:2119
 worker_thread+0x221/0x1850 kernel/workqueue.c:2253
 kthread+0x363/0x440 kernel/kthread.c:231
 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431

Freed by task 24:
 save_stack_trace+0x1b/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459
 kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:524
 slab_free_hook mm/slub.c:1390
 slab_free_freelist_hook mm/slub.c:1412
 slab_free mm/slub.c:2988
 kfree+0xf6/0x2f0 mm/slub.c:3919
 dtt200u_fe_release+0x3c/0x50 drivers/media/usb/dvb-usb/dtt200u-fe.c:202
 dvb_frontend_invoke_release.part.13+0x1c/0x30 drivers/media/dvb-core/dvb_frontend.c:2790
 dvb_frontend_invoke_release drivers/media/dvb-core/dvb_frontend.c:2789
 __dvb_frontend_free+0xad/0x120 drivers/media/dvb-core/dvb_frontend.c:153
 dvb_frontend_put+0x59/0x70 drivers/media/dvb-core/dvb_frontend.c:176
 dvb_frontend_detach+0x120/0x150 drivers/media/dvb-core/dvb_frontend.c:2803
 dvb_usb_adapter_frontend_exit+0xd6/0x160 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:340
 dvb_usb_adapter_exit drivers/media/usb/dvb-usb/dvb-usb-init.c:116
 dvb_usb_exit+0x9b/0x200 drivers/media/usb/dvb-usb/dvb-usb-init.c:132
 dvb_usb_device_exit+0xa5/0xf0 drivers/media/usb/dvb-usb/dvb-usb-init.c:295
 usb_unbind_interface+0x21c/0xa90 drivers/usb/core/driver.c:423
 __device_release_driver drivers/base/dd.c:861
 device_release_driver_internal+0x4f1/0x5c0 drivers/base/dd.c:893
 device_release_driver+0x1e/0x30 drivers/base/dd.c:918
 bus_remove_device+0x2f4/0x4b0 drivers/base/bus.c:565
 device_del+0x5c4/0xab0 drivers/base/core.c:1985
 usb_disable_device+0x1e9/0x680 drivers/usb/core/message.c:1170
 usb_disconnect+0x260/0x7a0 drivers/usb/core/hub.c:2124
 hub_port_connect drivers/usb/core/hub.c:4754
 hub_port_connect_change drivers/usb/core/hub.c:5009
 port_event drivers/usb/core/hub.c:5115
 hub_event+0x1318/0x3740 drivers/usb/core/hub.c:5195
 process_one_work+0xc73/0x1d90 kernel/workqueue.c:2119
 worker_thread+0x221/0x1850 kernel/workqueue.c:2253
 kthread+0x363/0x440 kernel/kthread.c:231
 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431

The buggy address belongs to the object at ffff880067d45500
 which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 1280 bytes inside of
 2048-byte region [ffff880067d45500, ffff880067d45d00)
The buggy address belongs to the page:
page:ffffea00019f5000 count:1 mapcount:0 mapping:          (null)
index:0x0 compound_mapcount: 0
flags: 0x100000000008100(slab|head)
raw: 0100000000008100 0000000000000000 0000000000000000 00000001000f000f
raw: dead000000000100 dead000000000200 ffff88006c002d80 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff880067d45900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff880067d45980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff880067d45a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff880067d45a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff880067d45b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

Fixes: ead66600 ("media: dvb_frontend: only use kref after initialized")
Reported-by: NAndrey Konovalov <andreyknvl@google.com>
Suggested-by: NMatthias Schwarzott <zzam@gentoo.org>
Tested-by: NAndrey Konovalov <andreyknvl@google.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

dvb_detach(arg) calls symbol_put_addr(arg), where arg should be a pointer
to a function. Right now a pointer to state->dib7000p_ops is passed to
dvb_detach(), which causes a BUG() in symbol_put_addr() as discovered by
syzkaller. Pass state->dib7000p_ops.set_wbd_ref instead.

------------[ cut here ]------------
kernel BUG at kernel/module.c:1081!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 1151 Comm: kworker/1:1 Tainted: G        W
4.14.0-rc1-42251-gebb2c243 #224
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
Workqueue: usb_hub_wq hub_event
task: ffff88006a336300 task.stack: ffff88006a7c8000
RIP: 0010:symbol_put_addr+0x54/0x60 kernel/module.c:1083
RSP: 0018:ffff88006a7ce210 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff880062a8d190 RCX: 0000000000000000
RDX: dffffc0000000020 RSI: ffffffff85876d60 RDI: ffff880062a8d190
RBP: ffff88006a7ce218 R08: 1ffff1000d4f9c12 R09: 1ffff1000d4f9ae4
R10: 1ffff1000d4f9bed R11: 0000000000000000 R12: ffff880062a8d180
R13: 00000000ffffffed R14: ffff880062a8d190 R15: ffff88006947c000
FS:  0000000000000000(0000) GS:ffff88006c900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6416532000 CR3: 00000000632f5000 CR4: 00000000000006e0
Call Trace:
 stk7070p_frontend_attach+0x515/0x610
drivers/media/usb/dvb-usb/dib0700_devices.c:1013
 dvb_usb_adapter_frontend_init+0x32b/0x660
drivers/media/usb/dvb-usb/dvb-usb-dvb.c:286
 dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:86
 dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:162
 dvb_usb_device_init+0xf70/0x17f0 drivers/media/usb/dvb-usb/dvb-usb-init.c:277
 dib0700_probe+0x171/0x5a0 drivers/media/usb/dvb-usb/dib0700_core.c:886
 usb_probe_interface+0x35d/0x8e0 drivers/usb/core/driver.c:361
 really_probe drivers/base/dd.c:413
 driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
 __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
 bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
 __device_attach+0x26e/0x3d0 drivers/base/dd.c:710
 device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
 bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
 device_add+0xd0b/0x1660 drivers/base/core.c:1835
 usb_set_configuration+0x104e/0x1870 drivers/usb/core/message.c:1932
 generic_probe+0x73/0xe0 drivers/usb/core/generic.c:174
 usb_probe_device+0xaf/0xe0 drivers/usb/core/driver.c:266
 really_probe drivers/base/dd.c:413
 driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
 __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
 bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
 __device_attach+0x26e/0x3d0 drivers/base/dd.c:710
 device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
 bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
 device_add+0xd0b/0x1660 drivers/base/core.c:1835
 usb_new_device+0x7b8/0x1020 drivers/usb/core/hub.c:2457
 hub_port_connect drivers/usb/core/hub.c:4903
 hub_port_connect_change drivers/usb/core/hub.c:5009
 port_event drivers/usb/core/hub.c:5115
 hub_event+0x194d/0x3740 drivers/usb/core/hub.c:5195
 process_one_work+0xc7f/0x1db0 kernel/workqueue.c:2119
 worker_thread+0x221/0x1850 kernel/workqueue.c:2253
 kthread+0x3a1/0x470 kernel/kthread.c:231
 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431
Code: ff ff 48 85 c0 74 24 48 89 c7 e8 48 ea ff ff bf 01 00 00 00 e8
de 20 e3 ff 65 8b 05 b7 2f c2 7e 85 c0 75 c9 e8 f9 0b c1 ff eb c2 <0f>
0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 b8 00 00
RIP: symbol_put_addr+0x54/0x60 RSP: ffff88006a7ce210
---[ end trace b75b357739e7e116 ]---
Signed-off-by: NAndrey Konovalov <andreyknvl@google.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

There is no need to repeat what check_range() does for us, i.e. BITMASK
validation in v4l2_ctrl_new().
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

The driver mmap functions shouldn't take lock when calling vb2_mmap().
Fix it to not take the lock. The following lockdep warning is fixed
with this change.

[ 2106.181412] ======================================================
[ 2106.187563] WARNING: possible circular locking dependency detected
[ 2106.193718] 4.14.0-rc2-00002-gfab205f-dirty #4 Not tainted
[ 2106.199175] ------------------------------------------------------
[ 2106.205328] qtdemux0:sink/2614 is trying to acquire lock:
[ 2106.210701]  (&dev->mfc_mutex){+.+.}, at: [<bf175544>] s5p_mfc_mmap+0x28/0xd4 [s5p_mfc]
[ 2106.218672]
[ 2106.218672] but task is already holding lock:
[ 2106.224477]  (&mm->mmap_sem){++++}, at: [<c01df2e4>] vm_mmap_pgoff+0x44/0xb8
[ 2106.231497]
[ 2106.231497] which lock already depends on the new lock.
[ 2106.231497]
[ 2106.239642]
[ 2106.239642] the existing dependency chain (in reverse order) is:
[ 2106.247095]
[ 2106.247095] -> #1 (&mm->mmap_sem){++++}:
[ 2106.252473]        __might_fault+0x80/0xb0
[ 2106.256567]        video_usercopy+0x1cc/0x510 [videodev]
[ 2106.261845]        v4l2_ioctl+0xa4/0xdc [videodev]
[ 2106.266596]        do_vfs_ioctl+0xa0/0xa18
[ 2106.270667]        SyS_ioctl+0x34/0x5c
[ 2106.274395]        ret_fast_syscall+0x0/0x28
[ 2106.278637]
[ 2106.278637] -> #0 (&dev->mfc_mutex){+.+.}:
[ 2106.284186]        lock_acquire+0x6c/0x88
[ 2106.288173]        __mutex_lock+0x68/0xa34
[ 2106.292244]        mutex_lock_interruptible_nested+0x1c/0x24
[ 2106.297893]        s5p_mfc_mmap+0x28/0xd4 [s5p_mfc]
[ 2106.302747]        v4l2_mmap+0x54/0x88 [videodev]
[ 2106.307409]        mmap_region+0x3a8/0x638
[ 2106.311480]        do_mmap+0x330/0x3a4
[ 2106.315207]        vm_mmap_pgoff+0x90/0xb8
[ 2106.319279]        SyS_mmap_pgoff+0x90/0xc0
[ 2106.323439]        ret_fast_syscall+0x0/0x28
[ 2106.327683]
[ 2106.327683] other info that might help us debug this:
[ 2106.327683]
[ 2106.335656]  Possible unsafe locking scenario:
[ 2106.335656]
[ 2106.341548]        CPU0                    CPU1
[ 2106.346053]        ----                    ----
[ 2106.350559]   lock(&mm->mmap_sem);
[ 2106.353939]                                lock(&dev->mfc_mutex);
[ 2106.353939]                                lock(&dev->mfc_mutex);
[ 2106.365897]   lock(&dev->mfc_mutex);
[ 2106.369450]
[ 2106.369450]  *** DEADLOCK ***
[ 2106.369450]
[ 2106.375344] 1 lock held by qtdemux0:sink/2614:
[ 2106.379762]  #0:  (&mm->mmap_sem){++++}, at: [<c01df2e4>] vm_mmap_pgoff+0x44/0xb8
[ 2106.387214]
[ 2106.387214] stack backtrace:
[ 2106.391550] CPU: 7 PID: 2614 Comm: qtdemux0:sink Not tainted 4.14.0-rc2-00002-gfab205f-dirty #4
[ 2106.400213] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
[ 2106.406285] [<c01102c8>] (unwind_backtrace) from [<c010cabc>] (show_stack+0x10/0x14)
[ 2106.413995] [<c010cabc>] (show_stack) from [<c08543a4>] (dump_stack+0x98/0xc4)
[ 2106.421187] [<c08543a4>] (dump_stack) from [<c016b2fc>] (print_circular_bug+0x254/0x410)
[ 2106.429245] [<c016b2fc>] (print_circular_bug) from [<c016c580>] (check_prev_add+0x468/0x938)
[ 2106.437651] [<c016c580>] (check_prev_add) from [<c016f4dc>] (__lock_acquire+0x1314/0x14fc)
[ 2106.445883] [<c016f4dc>] (__lock_acquire) from [<c016fefc>] (lock_acquire+0x6c/0x88)
[ 2106.453596] [<c016fefc>] (lock_acquire) from [<c0869fb4>] (__mutex_lock+0x68/0xa34)
[ 2106.461221] [<c0869fb4>] (__mutex_lock) from [<c086aa08>] (mutex_lock_interruptible_nested+0x1c/0x24)
[ 2106.470425] [<c086aa08>] (mutex_lock_interruptible_nested) from [<bf175544>] (s5p_mfc_mmap+0x28/0xd4 [s5p_mfc])
[ 2106.480494] [<bf175544>] (s5p_mfc_mmap [s5p_mfc]) from [<bf037120>] (v4l2_mmap+0x54/0x88 [videodev])
[ 2106.489575] [<bf037120>] (v4l2_mmap [videodev]) from [<c01f4798>] (mmap_region+0x3a8/0x638)
[ 2106.497875] [<c01f4798>] (mmap_region) from [<c01f4d58>] (do_mmap+0x330/0x3a4)
[ 2106.505068] [<c01f4d58>] (do_mmap) from [<c01df330>] (vm_mmap_pgoff+0x90/0xb8)
[ 2106.512260] [<c01df330>] (vm_mmap_pgoff) from [<c01f28cc>] (SyS_mmap_pgoff+0x90/0xc0)
[ 2106.520059] [<c01f28cc>] (SyS_mmap_pgoff) from [<c0108820>] (ret_fast_syscall+0x0/0x28)
Signed-off-by: NShuah Khan <shuahkh@osg.samsung.com>
Suggested-by: NHans Verkuil <hansverk@cisco.com>
Acked-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Acked-by: NHans Verkuil <hansverk@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Follow-up to: ead66600 ("media: dvb_frontend: only use kref after initialized")

The aforementioned commit fixed refcount OOPSes when demod driver attaching
succeeded but tuner driver didn't. However, the use count of the attached
demod drivers don't go back to zero and thus couldn't be cleanly unloaded.
Improve on this by calling dvb_frontend_invoke_release() in
__dvb_frontend_free() regardless of fepriv being NULL, instead of returning
when fepriv is NULL. This is safe to do since _invoke_release() will check
for passed pointers being valid before calling the .release() function.

[mchehab@s-opensource.com: changed the logic a little bit to reduce
 conflicts with another bug fix patch under review]
Fixes: ead66600 ("media: dvb_frontend: only use kref after initialized")
Signed-off-by: NDaniel Scheller <d.scheller@gmx.net>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Check on return value and goto instruction is redundant as the code
that follows is the goto label err.

Addresses-Coverity-ID: 1268783
Signed-off-by: NGustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Don't populate array addr_list on the stack but instead make it
static. Makes the object code smaller by over 360 bytes:

Before:
   text    data     bss     dec     hex filename
   8036    1488     192    9716    25f4 au0828-input.o

After:
   text    data     bss     dec     hex filename
   7696    1488     192    9376    24a0 au0828-input.o

(gcc version 7.2.0 x86_64)
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Don't populate arrays default_addr_list and pvr2000_addr_list on the
stack but instead make them static. Makes the object code smaller by
over 340 bytes:

Before:
   text	   data	    bss	    dec	    hex	filename
  12520	   2800	     64	  15384	   3c18	drivers/media/pci/cx88/cx88-input.o

After:
   text	   data	    bss	    dec	    hex	filename
  12142	   2832	     64	  15038	   3abe	drivers/media/pci/cx88/cx88-input.o

(gcc version 7.2.0 x86_64)
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Don't populate array fastIncrDecLUT on the stack but instead make it
static. Makes the object code smaller by over 360 bytes:

   text	   data	    bss	    dec	    hex	filename
  32680	    944	     64	  33688	   8398	drxd_hard.o

   text	   data	    bss	    dec	    hex	filename
  32223	   1040	     64	  33327	   822f	drxd_hard.o

(gcc version 7.2.0 x86_64)
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Trivial fix to spelling mistake in error message text

[mchehab@s-opensource.org: folded all similar patches into one]
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Fix 2 build warnings.
These functions are void, so drop the "return"s.

./drivers/media/pci/ddbridge/ddbridge-io.h: warning: 'return' with a value, in function returning void [enabled by default]:  => 50:2, 55:2
Signed-off-by: NRandy Dunlap <rdunlap@infradead.org>
Reported-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Cc: Daniel Scheller <d.scheller.oss@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Using the deprecated do_gettimeofday() in print_time() will overflow
in 2038 on 32-bit architectures. It'sbetter to use a structure that
is safe everywhere. While we're at it, fix the missing leading zeroes
on the sub-second portion.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Firmware load on AS102 is using the stack which is not allowed any
longer. We currently fail with:

kernel: transfer buffer not dma capable
kernel: ------------[ cut here ]------------
kernel: WARNING: CPU: 0 PID: 598 at drivers/usb/core/hcd.c:1595 usb_hcd_map_urb_for_dma+0x41d/0x620
kernel: Modules linked in: amd64_edac_mod(-) edac_mce_amd as102_fe dvb_as102(+) kvm_amd kvm snd_hda_codec_realtek dvb_core snd_hda_codec_generic snd_hda_codec_hdmi snd_hda_intel snd_hda_codec irqbypass crct10dif_pclmul crc32_pclmul snd_hda_core snd_hwdep snd_seq ghash_clmulni_intel sp5100_tco fam15h_power wmi k10temp i2c_piix4 snd_seq_device snd_pcm snd_timer parport_pc parport tpm_infineon snd tpm_tis soundcore tpm_tis_core tpm shpchp acpi_cpufreq xfs libcrc32c amdgpu amdkfd amd_iommu_v2 radeon hid_logitech_hidpp i2c_algo_bit drm_kms_helper crc32c_intel ttm drm r8169 mii hid_logitech_dj
kernel: CPU: 0 PID: 598 Comm: systemd-udevd Not tainted 4.13.10-200.fc26.x86_64 #1
kernel: Hardware name: ASUS All Series/AM1I-A, BIOS 0505 03/13/2014
kernel: task: ffff979933b24c80 task.stack: ffffaf83413a4000
kernel: RIP: 0010:usb_hcd_map_urb_for_dma+0x41d/0x620
systemd-fsck[659]: /dev/sda2: clean, 49/128016 files, 268609/512000 blocks
kernel: RSP: 0018:ffffaf83413a7728 EFLAGS: 00010282
systemd-udevd[604]: link_config: autonegotiation is unset or enabled, the speed and duplex are not writable.
kernel: RAX: 000000000000001f RBX: ffff979930bce780 RCX: 0000000000000000
kernel: RDX: 0000000000000000 RSI: ffff97993ec0e118 RDI: ffff97993ec0e118
kernel: RBP: ffffaf83413a7768 R08: 000000000000039a R09: 0000000000000000
kernel: R10: 0000000000000001 R11: 00000000ffffffff R12: 00000000fffffff5
kernel: R13: 0000000001400000 R14: 0000000000000001 R15: ffff979930806800
kernel: FS:  00007effaca5c8c0(0000) GS:ffff97993ec00000(0000) knlGS:0000000000000000
kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kernel: CR2: 00007effa9fca962 CR3: 0000000233089000 CR4: 00000000000406f0
kernel: Call Trace:
kernel:  usb_hcd_submit_urb+0x493/0xb40
kernel:  ? page_cache_tree_insert+0x100/0x100
kernel:  ? xfs_iunlock+0xd5/0x100 [xfs]
kernel:  ? xfs_file_buffered_aio_read+0x57/0xc0 [xfs]
kernel:  usb_submit_urb+0x22d/0x560
kernel:  usb_start_wait_urb+0x6e/0x180
kernel:  usb_bulk_msg+0xb8/0x160
kernel:  as102_send_ep1+0x49/0xe0 [dvb_as102]
kernel:  ? devres_add+0x3f/0x50
kernel:  as102_firmware_upload.isra.0+0x1dc/0x210 [dvb_as102]
kernel:  as102_fw_upload+0xb6/0x1f0 [dvb_as102]
kernel:  as102_dvb_register+0x2af/0x2d0 [dvb_as102]
kernel:  as102_usb_probe+0x1f3/0x260 [dvb_as102]
kernel:  usb_probe_interface+0x124/0x300
kernel:  driver_probe_device+0x2ff/0x450
kernel:  __driver_attach+0xa4/0xe0
kernel:  ? driver_probe_device+0x450/0x450
kernel:  bus_for_each_dev+0x6e/0xb0
kernel:  driver_attach+0x1e/0x20
kernel:  bus_add_driver+0x1c7/0x270
kernel:  driver_register+0x60/0xe0
kernel:  usb_register_driver+0x81/0x150
kernel:  ? 0xffffffffc0807000
kernel:  as102_usb_driver_init+0x1e/0x1000 [dvb_as102]
kernel:  do_one_initcall+0x50/0x190
kernel:  ? __vunmap+0x81/0xb0
kernel:  ? kfree+0x154/0x170
kernel:  ? kmem_cache_alloc_trace+0x15f/0x1c0
kernel:  ? do_init_module+0x27/0x1e9
kernel:  do_init_module+0x5f/0x1e9
kernel:  load_module+0x2602/0x2c30
kernel:  SYSC_init_module+0x170/0x1a0
kernel:  ? SYSC_init_module+0x170/0x1a0
kernel:  SyS_init_module+0xe/0x10
kernel:  do_syscall_64+0x67/0x140
kernel:  entry_SYSCALL64_slow_path+0x25/0x25
kernel: RIP: 0033:0x7effab6cf3ea
kernel: RSP: 002b:00007fff5cfcbbc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000af
kernel: RAX: ffffffffffffffda RBX: 00005569e0b83760 RCX: 00007effab6cf3ea
kernel: RDX: 00007effac2099c5 RSI: 0000000000009a13 RDI: 00005569e0b98c50
kernel: RBP: 00007effac2099c5 R08: 00005569e0b83ed0 R09: 0000000000001d80
kernel: R10: 00007effab98db00 R11: 0000000000000246 R12: 00005569e0b98c50
kernel: R13: 00005569e0b81c60 R14: 0000000000020000 R15: 00005569dfadfdf7
kernel: Code: 48 39 c8 73 30 80 3d 59 60 9d 00 00 41 bc f5 ff ff ff 0f 85 26 ff ff ff 48 c7 c7 b8 6b d0 92 c6 05 3f 60 9d 00 01 e8 24 3d ad ff <0f> ff 8b 53 64 e9 09 ff ff ff 65 48 8b 0c 25 00 d3 00 00 48 8b
kernel: ---[ end trace c4cae366180e70ec ]---
kernel: as10x_usb: error during firmware upload part1

Let's allocate the the structure dynamically so we can get the firmware
loaded correctly:
[   14.243057] as10x_usb: firmware: as102_data1_st.hex loaded with success
[   14.500777] as10x_usb: firmware: as102_data2_st.hex loaded with success
Signed-off-by: NMichele Baldessari <michele@acksyn.org>
Cc: stable@vger.kernel.org
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

The commit aef69d54 ("media: v4l: fwnode: Add a convenience
function for registering sensors") adds the function
v4l2_async_notifier_parse_fwnode_sensor_common() to parse and register a
subdevice and a subdev-notifier by parsing firmware information. This
new subdev-notifier is stored in the new field 'subdev_notifier' in
struct v4l2_subdev.

In v4l2_async_unregister_subdev() this field is used to unregister and
cleanup the subdev-notifier. A check for if the subdev-notifier is
initialized or not was forgotten leading to a NULL pointer dereference
in v4l2_async_notifier_cleanup() if a subdevice do not use the optional
convince function to initialize the field.

Fix this by checking in v4l2_async_notifier_cleanup() that it is
provided whit a notifier making it safe to call with a NULL parameter.

Fixes: aef69d54 ("media: v4l: fwnode: Add a convenience function for registering sensors")
Signed-off-by: NNiklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

A shadow declaration of variable ret is being assigned a return error
status and this value is being lost when the error exit goto's jump
out of the local scope. This leads to an uninitalized error return value
in the outer scope being returned. Fix this by removing the inner scoped
declaration of variable ret.

Detected by CoverityScan, CID#1460380 ("Uninitialized scalar variable")

Fixes: fb45f436 ("media: v4l: async: Fix notifier complete callback error handling")
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Reviewed-by: NNiklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

The variable ret is being checked for failure however it is not being set
from the return status from the call to imx274_mode_regs. Currently ret is
alwayus zero and the check is redundant. Fix this by assigning it.

Detected by CoverityScan, CID#1460278 ("Logically dead code")

Fixes: 0985dd30 ("media: imx274: V4l2 driver for Sony imx274 CMOS sensor")
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Leave the autorepeat handling up to the input layer, and move
to the new timer API.

Compile tested only.
Signed-off-by: NSean Young <sean@mess.org>
Acked-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>