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3af07613
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体验新版 GitCode,发现更多精彩内容 >>
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3af07613
编写于
4月 13, 2013
作者:
A
Al Viro
浏览文件
操作
浏览文件
下载
电子邮件补丁
差异文件
cx25821: sanitize cx25821_openfile_audio() a bit...
Signed-off-by:
N
Al Viro
<
viro@zeniv.linux.org.uk
>
上级
2ce8fce2
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
28 addition
and
68 deletion
+28
-68
drivers/media/pci/cx25821/cx25821-audio-upstream.c
drivers/media/pci/cx25821/cx25821-audio-upstream.c
+28
-68
未找到文件。
drivers/media/pci/cx25821/cx25821-audio-upstream.c
浏览文件 @
3af07613
...
...
@@ -321,81 +321,41 @@ static void cx25821_audioups_handler(struct work_struct *work)
static
int
cx25821_openfile_audio
(
struct
cx25821_dev
*
dev
,
struct
sram_channel
*
sram_ch
)
{
struct
file
*
myfile
;
int
i
=
0
,
j
=
0
;
int
line_size
=
AUDIO_LINE_SIZE
;
ssize_t
vfs_read_retval
=
0
;
char
mybuf
[
line_size
];
loff_t
pos
;
loff_t
offset
=
(
unsigned
long
)
0
;
mm_segment_t
old_fs
;
myfile
=
filp_open
(
dev
->
_audiofilename
,
O_RDONLY
|
O_LARGEFILE
,
0
);
if
(
IS_ERR
(
myfile
))
{
const
int
open_errno
=
-
PTR_ERR
(
myfile
);
pr_err
(
"%s(): ERROR opening file(%s) with errno = %d!
\n
"
,
__func__
,
dev
->
_audiofilename
,
open_errno
);
return
PTR_ERR
(
myfile
);
}
else
{
if
(
!
(
myfile
->
f_op
))
{
pr_err
(
"%s(): File has no file operations registered!
\n
"
,
__func__
);
filp_close
(
myfile
,
NULL
);
return
-
EIO
;
}
if
(
!
myfile
->
f_op
->
read
)
{
pr_err
(
"%s(): File has no READ operations registered!
\n
"
,
__func__
);
filp_close
(
myfile
,
NULL
);
return
-
EIO
;
}
pos
=
myfile
->
f_pos
;
old_fs
=
get_fs
();
set_fs
(
KERNEL_DS
);
for
(
j
=
0
;
j
<
NUM_AUDIO_FRAMES
;
j
++
)
{
for
(
i
=
0
;
i
<
dev
->
_audio_lines_count
;
i
++
)
{
pos
=
offset
;
vfs_read_retval
=
vfs_read
(
myfile
,
mybuf
,
line_size
,
&
pos
);
if
(
vfs_read_retval
>
0
&&
vfs_read_retval
==
line_size
&&
dev
->
_audiodata_buf_virt_addr
!=
NULL
)
{
memcpy
((
void
*
)(
dev
->
_audiodata_buf_virt_addr
+
offset
/
4
),
mybuf
,
vfs_read_retval
);
}
char
*
p
=
(
void
*
)
dev
->
_audiodata_buf_virt_addr
;
struct
file
*
file
;
loff_t
offset
;
int
i
,
j
;
offset
+=
vfs_read_retval
;
file
=
filp_open
(
dev
->
_audiofilename
,
O_RDONLY
|
O_LARGEFILE
,
0
);
if
(
IS_ERR
(
file
))
{
pr_err
(
"%s(): ERROR opening file(%s) with errno = %ld!
\n
"
,
__func__
,
dev
->
_audiofilename
,
PTR_ERR
(
file
));
return
PTR_ERR
(
file
);
}
if
(
vfs_read_retval
<
line_size
)
{
pr_info
(
"Done: exit %s() since no more bytes to read from Audio file
\n
"
,
__func__
);
break
;
}
for
(
j
=
0
,
offset
=
0
;
j
<
NUM_AUDIO_FRAMES
;
j
++
)
{
for
(
i
=
0
;
i
<
dev
->
_audio_lines_count
;
i
++
)
{
char
buf
[
AUDIO_LINE_SIZE
];
int
n
=
kernel_read
(
file
,
offset
,
buf
,
AUDIO_LINE_SIZE
);
if
(
n
<
AUDIO_LINE_SIZE
)
{
pr_info
(
"Done: exit %s() since no more bytes to read from Audio file
\n
"
,
__func__
);
dev
->
_audiofile_status
=
END_OF_FILE
;
fput
(
file
);
return
0
;
}
if
(
i
>
0
)
dev
->
_audioframe_count
++
;
if
(
p
)
memcpy
(
p
+
offset
,
buf
,
n
)
;
if
(
vfs_read_retval
<
line_size
)
break
;
offset
+=
n
;
}
dev
->
_audiofile_status
=
(
vfs_read_retval
==
line_size
)
?
IN_PROGRESS
:
END_OF_FILE
;
set_fs
(
old_fs
);
myfile
->
f_pos
=
0
;
filp_close
(
myfile
,
NULL
);
dev
->
_audioframe_count
++
;
}
dev
->
_audiofile_status
=
IN_PROGRESS
;
fput
(
file
);
return
0
;
}
...
...
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