According to Section 8.5.3.2 of the USB 2.0 specification,
a USB device must terminate a Data Phase with either a
short packet or a ZLP (if the previous transfer was
a multiple of wMaxPacketSize).

For reference, here's what the USB 2.0 specification, section
8.5.3.2 says:

"
8.5.3.2 Variable-length Data Stage

A control pipe may have a variable-length data phase
in which the host requests more data than is contained
in the specified data structure. When all of the data
structure is returned to the host, the function should
indicate that the Data stage is ended by returning a
packet that is shorter than the MaxPacketSize for the
pipe. If the data structure is an exact multiple of
wMaxPacketSize for the pipe, the function will return
a zero-length packet to indicate the end of the Data
stage.
"
Signed-off-by: NFelipe Balbi <balbi@ti.com>

if our list of requests is empty, return early.

There's really nothing to be done in case our
request list is empty anyway because the only
situation where we our list is empty, is when
we're transferring ZLPs.
Signed-off-by: NFelipe Balbi <balbi@ti.com>

The device controller is the same but it has different PCI ID. Add this new
ID to the driver's list of supported IDs.
Signed-off-by: NAlan Cox <alan@linux.intel.com>
Signed-off-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: NHeikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

On USB20CV's Interface Descriptor Test, a series
of SetInterface/GetInterface requests are issued
and gadget driver is required to always return
correct alternate setting.

In one step of the test, g_serial with f_obex
was returning the wrong value (1 instead of 0).

In order to fix this, we will now hold currently
selected alternate setting inside our struct f_obex
and just return that from our ->get_alt()
implementation.

Note that his also simplifies the code a bit.
Signed-off-by: NFelipe Balbi <balbi@ti.com>

devices are required to provide a release method. This
patch fixes the following WARN():

[   42.611159] ------------[ cut here ]------------
[   42.616025] WARNING: CPU: 0 PID: 1453 at drivers/base/core.c:250 device_release+0x94/0xa0()
[   42.624820] Device 'snd_uac2.0' does not have a release() function, it is broken and must be fixed.
[   42.634328] Modules linked in: usb_f_uac2 g_audio(-) libcomposite configfs xhci_hcd snd_soc_davinci_mcasp snd_soc_edma snd_soc_tlv320aic3x snd_soc_omap snd_soc_evm snd_soc_core dwc3 snd_compress omapdrm snd_pcm_dmaengine snd_pcm snd_timer snd fb_sys_fops lis3lv02d_i2c matrix_keypad dwc3_omap lis3lv02d panel_dpi input_polldev soundcore
[   42.665687] CPU: 0 PID: 1453 Comm: modprobe Tainted: G      D        3.17.0-rc6-00448-g9f3d0ec-dirty #188
[   42.675756] [<c0017338>] (unwind_backtrace) from [<c0012fdc>] (show_stack+0x20/0x24)
[   42.683911] [<c0012fdc>] (show_stack) from [<c0647fbc>] (dump_stack+0x8c/0xa4)
[   42.691526] [<c0647fbc>] (dump_stack) from [<c0049950>] (warn_slowpath_common+0x7c/0xa0)
[   42.700004] [<c0049950>] (warn_slowpath_common) from [<c00499b4>] (warn_slowpath_fmt+0x40/0x48)
[   42.709194] [<c00499b4>] (warn_slowpath_fmt) from [<c0405f7c>] (device_release+0x94/0xa0)
[   42.717794] [<c0405f7c>] (device_release) from [<c032e8e8>] (kobject_cleanup+0x4c/0x7c)
[   42.726189] [<c032e8e8>] (kobject_cleanup) from [<c032e7c8>] (kobject_put+0x60/0x90)
[   42.734316] [<c032e7c8>] (kobject_put) from [<c0406320>] (put_device+0x24/0x28)
[   42.741995] [<c0406320>] (put_device) from [<c040c008>] (platform_device_unregister+0x2c/0x30)
[   42.751061] [<c040c008>] (platform_device_unregister) from [<bf2b6b70>] (afunc_unbind+0x2c/0x68 [usb_f_uac2])
[   42.761523] [<bf2b6b70>] (afunc_unbind [usb_f_uac2]) from [<bf29dbec>] (remove_config.isra.8+0xe8/0x100 [libcomposite])
[   42.772868] [<bf29dbec>] (remove_config.isra.8 [libcomposite]) from [<bf29f9a4>] (__composite_unbind+0x48/0xb0 [libcomposite])
[   42.784855] [<bf29f9a4>] (__composite_unbind [libcomposite]) from [<bf29fa28>] (composite_unbind+0x1c/0x20 [libcomposite])
[   42.796446] [<bf29fa28>] (composite_unbind [libcomposite]) from [<c04d229c>] (usb_gadget_remove_driver+0x78/0xb0)
[   42.807224] [<c04d229c>] (usb_gadget_remove_driver) from [<c04d2348>] (usb_gadget_unregister_driver+0x74/0xb8)
[   42.817742] [<c04d2348>] (usb_gadget_unregister_driver) from [<bf29db00>] (usb_composite_unregister+0x1c/0x20 [libcomposite])
[   42.829632] [<bf29db00>] (usb_composite_unregister [libcomposite]) from [<bf2b1084>] (audio_driver_exit+0x14/0x1c [g_audio])
[   42.841430] [<bf2b1084>] (audio_driver_exit [g_audio]) from [<c00c0fe0>] (SyS_delete_module+0x120/0x1b0)
[   42.851415] [<c00c0fe0>] (SyS_delete_module) from [<c000ed40>] (ret_fast_syscall+0x0/0x48)
[   42.860075] ---[ end trace bb22e678d8d6db7b ]---
root@saruman:~#
Signed-off-by: NFelipe Balbi <balbi@ti.com>

without this check, f_uac2 would try to disable
the same endpoint twice. Fix that.
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Endpoint descriptors should pass wMaxPacketSize. Note
that this also fixes USB20CV Other Speed Endpoint
Descriptor Tests.
Signed-off-by: NFelipe Balbi <balbi@ti.com>

when our ->disable() method is called, we must
make sure to teardown all our resources, including
endpoints.
Signed-off-by: NFelipe Balbi <balbi@ti.com>

just like any other endpoint, we must enable/disable
our video control endpoint based on calls to our
->set_alt() method.
Signed-off-by: NFelipe Balbi <balbi@ti.com>

During Halt Endpoint Test, our interrupt endpoint
will be disabled, which will clear out ep->desc
to NULL. Unless we call config_ep_by_speed() again,
we will not be able to enable this endpoint which
will make us fail that test.

Fixes: f9c56cdd (usb: gadget: Clear usb_endpoint_descriptor
	inside the struct usb_ep on disable)
Cc: <stable@vger.kernel.org> # v3.4+
Signed-off-by: NFelipe Balbi <balbi@ti.com>

If our alternate setting has been selected, we must
return that on a subsequent Get Interface request
even if we're not streaming.
Signed-off-by: NFelipe Balbi <balbi@ti.com>

If a set_alt() to the same alternate setting that's
already selected is received, functions are required
to reset the interface state, this means we must disable
all endpoints and reenable them again.

This is also documented on our kdoc for struct usb_function

* @set_alt: (REQUIRED) Reconfigures altsettings; function drivers may
*	initialize usb_ep.driver data at this time (when it is used).
*	Note that setting an interface to its current altsetting resets
*	interface state, and that all interfaces have a disabled state.
Signed-off-by: NFelipe Balbi <balbi@ti.com>

We shouldn't try to dequeue a NULL pointer.
Signed-off-by: NFelipe Balbi <balbi@ti.com>

According to our Gadget Framework API documentation,
->set_halt() *must* return -EAGAIN if we have pending
transfers (on either direction) or FIFO isn't empty (on
TX endpoints).

Fix this bug so that the mass storage gadget can be used
without stall=0 parameter.

This patch should be backported to all kernels since v3.2.

Cc: <stable@vger.kernel.org> # v3.2+
Suggested-by: NAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Instead of releasing the lock and calling locked
versions of our set_halt() methods, let's hold
the lock all the way through and call unlocked
versions of those functions.
Signed-off-by: NFelipe Balbi <balbi@ti.com>

__dwc3_gadget_ep_set_halt() is the function which
handles the actual halt feature. In order to cope
with some extra cleanup comming as a follow-up patch
let's move the isochronous endpoint check there too.
Signed-off-by: NFelipe Balbi <balbi@ti.com>

dwc3_gadget_ep0_set_halt() will be called without
locks held in some cases, so we must hold the lock
on our own. While at that, also add a version without
locks to be called in certain conditions.
Signed-off-by: NFelipe Balbi <balbi@ti.com>

The way trace works is that it won't decode strings
until we read the actual trace. Because of that, we
can't make assumptions of pointers still being valid
at the time we read the trace. In order to avoid that,
just copy all fields from every struct pointer we need
for our traces.

Ths patch fixes the following bug:

[ 2940.039229] Unable to handle kernel paging request at virtual address 814efa9e
[ 2940.046904] pgd = ec3dc000
[ 2940.049737] [814efa9e] *pgd=00000000
[ 2940.053552] Internal error: Oops: 5 [#1] SMP ARM
[ 2940.058379] Modules linked in: usb_f_acm u_serial g_serial usb_f_uac2 libcomposite configfs xhci_hcd dwc3 udc_core matrix_keypad dwc3_omap lis3lv02d_i2c lis3lv02d input_polldev [last unloaded: g_audio]
[ 2940.077238] CPU: 0 PID: 3020 Comm: tail Tainted: G        W
3.17.0-rc5-dirty #1097
[ 2940.085596] task: ed1b1040 ti: ed07c000 task.ti: ed07c000
[ 2940.091258] PC is at strnlen+0x18/0x68
[ 2940.095177] LR is at 0xfffffffe
[ 2940.098454] pc : [<c0356df8>]    lr : [<fffffffe>]    psr: a0000013
[ 2940.098454] sp : ed07ddb0  ip : ed07ddc0  fp : ed07ddbc
[ 2940.110445] r10: c070ff70  r9 : ed07de70  r8 : 00000000
[ 2940.115906] r7 : 814efa9e  r6 : ffffffff  r5 : ed4b6087  r4 : ed4b50c7
[ 2940.122726] r3 : 00000000  r2 : 814efa9e  r1 : ffffffff  r0 : 814efa9e
[ 2940.129546] Flags: NzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM Segment user
[ 2940.137000] Control: 10c5387d  Table: ac3dc059  DAC: 00000015
[ 2940.143006] Process tail (pid: 3020, stack limit = 0xed07c248)
[ 2940.149098] Stack: (0xed07ddb0 to 0xed07e000)
[ 2940.153660] dda0:                                     ed07dde4 ed07ddc0 c0359628 c0356dec
[ 2940.162203] ddc0: 00000000 ed4b50c7 bf03ae9c ed4b6087 bf03ae9e 00000002 ed07de3c ed07dde8
[ 2940.170740] dde0: c035ab50 c0359600 ffffffff ffffffff ff0a0000 ffffffff ed07de30 ed4b5088
[ 2940.179275] de00: ed4b50c7 00000fc0 ff0a0004 ffffffff ed4b5088 ed4b5088 00000000 00001000
[ 2940.187810] de20: 00001008 00000fc0 ed4b5088 00000000 ed07de68 ed07de40 c00f1e64 c035a9c4
[ 2940.196341] de40: bf03dae0 ed07de70 ed4b4000 ec25b280 ed4b4000 ec25b280 bf03dae0 ed07de9c
[ 2940.204886] de60: ed07de78 bf033324 c00f1e0c bf03ae9c 814efa9e ed428bc0 814eca3e 00000000
[ 2940.213428] de80: 814eba3e ed4b4000 03bd1201 c0c34790 ed07ded4 ed07dea0 c00edc0c bf0332d0
[ 2940.221994] dea0: 000002c7 ed07df10 ed07decc ed07deb8 ed4b4000 0000209c ec278ac0 00000000
[ 2940.230536] dec0: 00002000 ec0db340 ed07def4 ed07ded8 c00ee7ec c00eda90 c00ee7b0 ec278ac0
[ 2940.239075] dee0: ed4b4000 000002d5 ed07df44 ed07def8 c018b8d0 c00ee7bc c0166d3c ec278af0
[ 2940.247621] df00: 0001f090 ed07df78 000002c7 00000000 000002c8 00000000 00000000 ec0db340
[ 2940.256173] df20: 0001f090 ed07df78 ec0db340 00002000 0001f090 00000000 ed07df74 ed07df48
[ 2940.264729] df40: c0166e98 c018b5f4 00000001 c018535c 000168c1 00000000 ec0db340 ec0db340
[ 2940.273284] df60: 00002000 0001f090 ed07dfa4 ed07df78 c01675c4 c0166e0c 000168c1 00000000
[ 2940.281829] df80: 00002000 0000000a 0001f090 00000003 c000f064 ed07c000 00000000 ed07dfa8
[ 2940.290365] dfa0: c000ede0 c0167584 00002000 0000000a 00000003 0001f090 00002000 00000000
[ 2940.298909] dfc0: 00002000 0000000a 0001f090 00000003 7fffe000 0001e1e0 00002004 0000002f
[ 2940.307445] dfe0: 00000000 beed38ec 000104c8 b6e6397c 40000010 00000003 00000000 00000000
[ 2940.315992] [<c0356df8>] (strnlen) from [<c0359628>] (string.isra.8+0x34/0xe8)
[ 2940.323534] [<c0359628>] (string.isra.8) from [<c035ab50>] (vsnprintf+0x198/0x3fc)
[ 2940.331461] [<c035ab50>] (vsnprintf) from [<c00f1e64>] (trace_seq_printf+0x68/0x94)
[ 2940.339494] [<c00f1e64>] (trace_seq_printf) from [<bf033324>] (ftrace_raw_output_dwc3_log_request+0x60/0x78 [dwc3])
[ 2940.350424] [<bf033324>] (ftrace_raw_output_dwc3_log_request [dwc3]) from [<c00edc0c>] (print_trace_line+0x188/0x418)
[ 2940.361507] [<c00edc0c>] (print_trace_line) from [<c00ee7ec>] (s_show+0x3c/0x12c)
[ 2940.369330] [<c00ee7ec>] (s_show) from [<c018b8d0>] (seq_read+0x2e8/0x4a0)
[ 2940.376519] [<c018b8d0>] (seq_read) from [<c0166e98>] (vfs_read+0x98/0x158)
[ 2940.383796] [<c0166e98>] (vfs_read) from [<c01675c4>] (SyS_read+0x4c/0xa0)
[ 2940.390981] [<c01675c4>] (SyS_read) from [<c000ede0>] (ret_fast_syscall+0x0/0x48)
[ 2940.398792] Code: e24cb004 e3510000 e241e001 0a000011 (e5d01000)
[ 2940.406980] ---[ end trace d8b38370fbb531f3 ]---
Signed-off-by: NFelipe Balbi <balbi@ti.com>

skb->truesize is not meant to be tracking amount of used bytes
in an skb, but amount of reserved/consumed bytes in memory.

For instance, if we use a single byte in last page fragment,
we have to account the full size of the fragment.

skb->truesize can be very different from skb->len, that has
a very specific safety purpose.
Signed-off-by: NEric Dumazet <edumazet@google.com>
Cc: Rasesh Mody <rasesh.mody@qlogic.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Commit b4d2394d ("dsa: Replace mii_bus with a generic host device")
replaces mii_bus with a generic host_dev, and introduces
dsa_host_dev_to_mii_bus() to support conversion from host_dev to mii_bus.
However, in some cases it uses to_mii_bus to perform that conversion.
Since host_dev is not the phy bus device but typically a platform device,
this fails and results in a crash with the affected drivers.

BUG: unable to handle kernel NULL pointer dereference at           (null)
IP: [<ffffffff81781d35>] __mutex_lock_slowpath+0x75/0x100
PGD 406783067 PUD 406784067 PMD 0
Oops: 0002 [#1] SMP
...
Call Trace:
[<ffffffff810a538b>] ? pick_next_task_fair+0x61b/0x880
[<ffffffff81781de3>] mutex_lock+0x23/0x37
[<ffffffff81533244>] mdiobus_read+0x34/0x60
[<ffffffff8153b95a>] __mv88e6xxx_reg_read+0x8a/0xa0
[<ffffffff8153b9bc>] mv88e6xxx_reg_read+0x4c/0xa0

Fixes: b4d2394d ("dsa: Replace mii_bus with a generic host device")
Cc: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
Acked-by: NAlexander Duyck <alexander.h.duyck@redhat.com>
Acked-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Don't ring the doorbell, and don't do PIO.  This will also prevent
 TX Push, because there will be more than one buffer waiting when
 the doorbell is rung.
Signed-off-by: NEdward Cree <ecree@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Remove calling cancel_delayed_work_sync() for runtime suspend,
because it would cause dead lock. Instead, return -EBUSY to
avoid the device enters suspending if the net is running and
the delayed work is pending or running. The delayed work would
try to wake up the device later, so the suspending is not
necessary.
Signed-off-by: NHayes Wang <hayeswang@realtek.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

In case that the IP header has optional field at the end, this patch will
get the port numbers after that field, and compute the hash. The general
parser skb_flow_dissect() is used here.
Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: NK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

pskb_may_pull maybe change skb->data and make eth pointer oboslete,
so eth needs to reload

Fixes: 91269e39 ("vxlan: using pskb_may_pull as early as possible")
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: NLi RongQing <roy.qing.li@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This simplifies the lanai.c driver by using
the module_pci_driver() macro, at the expense
of losing only debugging messages.
Signed-off-by: NMichael Opdenacker <michael.opdenacker@free-electrons.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

On the Haswell platform, a split BAR option to allow creation of 2
32bit BARs (4 and 5) from the 64bit BAR 4. Adding support for this
new option.
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Signed-off-by: NJon Mason <jdmason@kudzu.us>

Instead of using a module parameter, we should detect the errata via
PCI DID and then set an appropriate flag. This will be used for additional
errata later on.
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Signed-off-by: NJon Mason <jdmason@kudzu.us>

To simplify some of the platform detection code. Move the platform detection
to a function to be called earlier.
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Signed-off-by: NJon Mason <jdmason@kudzu.us>

Move the platform detection function to separate functions to allow
easier maintenence.
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Signed-off-by: NJon Mason <jdmason@kudzu.us>

Create a debugfs entry for the NTB device to log the basic device info,
as well as display the error count on a number of registers.
Signed-off-by: NJon Mason <jon.mason@intel.com>

Add Thrustmaster as Xbox 360 controller vendor. This is required for
example to make the GP XID (044f:b326) gamepad work.
Signed-off-by: NTommi Rantala <tt.rantala@gmail.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Add the USB ID for the Xbox 360 Thrustmaster Ferrari 458 Racing Wheel.
Signed-off-by: NTommi Rantala <tt.rantala@gmail.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

The check to see whether the device is already disabled in
max77693_haptic_disable() was inversed, this change corrects it.
Signed-off-by: NJaewon Kim <jaewon02.kim@samsung.com>
Reviewed-by: NChanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

xenkbd_disconnect_backend doesn't free grant table entry.  This bug affects
live migration.

xenkbd_disconnect_backend uses gnttab_end_foreign_access_ref to handle
grant table entry which doesn't really free an entry.

Thus every time we do xenkbd_resume, grant table entry increses by one. As
an grant table entry occupies 8 bytes, an grant table page has at most 512
entries. Every 512 times we do xenkdb_resume, grant table pages increses by
one.

After around 3500 times of live migration, grant table pages will increase
by 7, causing too many pages to populate and hitting max_pages limit when
assigning pages.Thus assign_pages will fail, so will live migration.
Signed-off-by: NChang Huaixin <huaixin.chx@alibaba-inc.com>
Acked-by: NDavid Vrabel <david.vrabel@citrix.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

The check for vfinfo is not sufficient because it does not protect
against specifying vf that is outside of sriov_num_vfs range.
All of the ndo functions have a check for it except for
ixgbevf_ndo_set_spoofcheck().

The following patch is all we need to protect against this panic:

ip link set p96p1 vf 0 spoofchk off
BUG: unable to handle kernel NULL pointer dereference at 0000000000000052
IP: [<ffffffffa044a1c1>]
ixgbe_ndo_set_vf_spoofchk+0x51/0x150 [ixgbe]
Reported-by: NThierry Herbelot <thierry.herbelot@6wind.com>
Signed-off-by: NEmil Tantilov <emil.s.tantilov@intel.com>
Acked-by: NThierry Herbelot <thierry.herbelot@6wind.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Compiling with CONFIG_FM10K=y and VXLAN=m resulting in linking error:

   drivers/built-in.o: In function `fm10k_open':
   (.text+0x1f9d7a): undefined reference to `vxlan_get_rx_port'
   make: *** [vmlinux] Error 1

The fix follows the same strategy as I40E.
Signed-off-by: NAndy Zhou <azhou@nicira.com>
Acked-by: NAlexander Duyck <alexander.h.duyck@intel.com>
Tested-by: NAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

After grabbing the mailbox lock and detecting an error, the lock must be
released before the error code can be returned.
Signed-off-by: NMatthew Vick <matthew.vick@intel.com>
Tested-by: NAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

The atmel serial driver uses dmaengine APIs but never included the dmaengine
header as it was getting inculded thru one of driver headers.

commit 3d588f83 - "dmaengine: dw: split
dma-dw.h to platform and private parts" broke this as it moved headers
around.  Fix this by doing the right thing to include the dmaengine header
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Fixes: 08f738be (serial: at91: add tx dma support)
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NVinod Koul <vinod.koul@intel.com>

Set the flag to fetch the host state before kicking off the service task
that reads the host state when bringing the interface back up.
Signed-off-by: NMatthew Vick <matthew.vick@intel.com>
Tested-by: NAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch adds the I2C/SMBus Device IDs for the Intel Sunrise Point PCH.
Signed-off-by: NJames Ralston <james.d.ralston@intel.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>