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Kirill Smelkov
linux
Commits
ab8c77a9
Commit
ab8c77a9
authored
Jun 17, 2003
by
Greg Kroah-Hartman
Browse files
Options
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Email Patches
Plain Diff
[PATCH] USB: fix up sparse warnings in drivers/usb/class/*
parent
c993621b
Changes
5
Hide whitespace changes
Inline
Side-by-side
Showing
5 changed files
with
25 additions
and
25 deletions
+25
-25
drivers/usb/class/audio.c
drivers/usb/class/audio.c
+14
-14
drivers/usb/class/bluetty.c
drivers/usb/class/bluetty.c
+1
-1
drivers/usb/class/cdc-acm.c
drivers/usb/class/cdc-acm.c
+1
-1
drivers/usb/class/usb-midi.c
drivers/usb/class/usb-midi.c
+2
-2
drivers/usb/class/usblp.c
drivers/usb/class/usblp.c
+7
-7
No files found.
drivers/usb/class/audio.c
View file @
ab8c77a9
...
@@ -541,7 +541,7 @@ static void dmabuf_copyin(struct dmabuf *db, const void *buffer, unsigned int si
...
@@ -541,7 +541,7 @@ static void dmabuf_copyin(struct dmabuf *db, const void *buffer, unsigned int si
pgrem
=
rem
;
pgrem
=
rem
;
memcpy
((
db
->
sgbuf
[
db
->
wrptr
>>
PAGE_SHIFT
])
+
(
db
->
wrptr
&
(
PAGE_SIZE
-
1
)),
buffer
,
pgrem
);
memcpy
((
db
->
sgbuf
[
db
->
wrptr
>>
PAGE_SHIFT
])
+
(
db
->
wrptr
&
(
PAGE_SIZE
-
1
)),
buffer
,
pgrem
);
size
-=
pgrem
;
size
-=
pgrem
;
(
char
*
)
buffer
+=
pgrem
;
buffer
+=
pgrem
;
db
->
wrptr
+=
pgrem
;
db
->
wrptr
+=
pgrem
;
if
(
db
->
wrptr
>=
db
->
dmasize
)
if
(
db
->
wrptr
>=
db
->
dmasize
)
db
->
wrptr
=
0
;
db
->
wrptr
=
0
;
...
@@ -564,14 +564,14 @@ static void dmabuf_copyout(struct dmabuf *db, void *buffer, unsigned int size)
...
@@ -564,14 +564,14 @@ static void dmabuf_copyout(struct dmabuf *db, void *buffer, unsigned int size)
pgrem
=
rem
;
pgrem
=
rem
;
memcpy
(
buffer
,
(
db
->
sgbuf
[
db
->
rdptr
>>
PAGE_SHIFT
])
+
(
db
->
rdptr
&
(
PAGE_SIZE
-
1
)),
pgrem
);
memcpy
(
buffer
,
(
db
->
sgbuf
[
db
->
rdptr
>>
PAGE_SHIFT
])
+
(
db
->
rdptr
&
(
PAGE_SIZE
-
1
)),
pgrem
);
size
-=
pgrem
;
size
-=
pgrem
;
(
char
*
)
buffer
+=
pgrem
;
buffer
+=
pgrem
;
db
->
rdptr
+=
pgrem
;
db
->
rdptr
+=
pgrem
;
if
(
db
->
rdptr
>=
db
->
dmasize
)
if
(
db
->
rdptr
>=
db
->
dmasize
)
db
->
rdptr
=
0
;
db
->
rdptr
=
0
;
}
}
}
}
static
int
dmabuf_copyin_user
(
struct
dmabuf
*
db
,
unsigned
int
ptr
,
const
void
*
buffer
,
unsigned
int
size
)
static
int
dmabuf_copyin_user
(
struct
dmabuf
*
db
,
unsigned
int
ptr
,
const
void
__user
*
buffer
,
unsigned
int
size
)
{
{
unsigned
int
pgrem
,
rem
;
unsigned
int
pgrem
,
rem
;
...
@@ -589,14 +589,14 @@ static int dmabuf_copyin_user(struct dmabuf *db, unsigned int ptr, const void *b
...
@@ -589,14 +589,14 @@ static int dmabuf_copyin_user(struct dmabuf *db, unsigned int ptr, const void *b
if
(
copy_from_user
((
db
->
sgbuf
[
ptr
>>
PAGE_SHIFT
])
+
(
ptr
&
(
PAGE_SIZE
-
1
)),
buffer
,
pgrem
))
if
(
copy_from_user
((
db
->
sgbuf
[
ptr
>>
PAGE_SHIFT
])
+
(
ptr
&
(
PAGE_SIZE
-
1
)),
buffer
,
pgrem
))
return
-
EFAULT
;
return
-
EFAULT
;
size
-=
pgrem
;
size
-=
pgrem
;
(
char
*
)
buffer
+=
pgrem
;
buffer
+=
pgrem
;
ptr
+=
pgrem
;
ptr
+=
pgrem
;
if
(
ptr
>=
db
->
dmasize
)
if
(
ptr
>=
db
->
dmasize
)
ptr
=
0
;
ptr
=
0
;
}
}
}
}
static
int
dmabuf_copyout_user
(
struct
dmabuf
*
db
,
unsigned
int
ptr
,
void
*
buffer
,
unsigned
int
size
)
static
int
dmabuf_copyout_user
(
struct
dmabuf
*
db
,
unsigned
int
ptr
,
void
__user
*
buffer
,
unsigned
int
size
)
{
{
unsigned
int
pgrem
,
rem
;
unsigned
int
pgrem
,
rem
;
...
@@ -614,7 +614,7 @@ static int dmabuf_copyout_user(struct dmabuf *db, unsigned int ptr, void *buffer
...
@@ -614,7 +614,7 @@ static int dmabuf_copyout_user(struct dmabuf *db, unsigned int ptr, void *buffer
if
(
copy_to_user
(
buffer
,
(
db
->
sgbuf
[
ptr
>>
PAGE_SHIFT
])
+
(
ptr
&
(
PAGE_SIZE
-
1
)),
pgrem
))
if
(
copy_to_user
(
buffer
,
(
db
->
sgbuf
[
ptr
>>
PAGE_SHIFT
])
+
(
ptr
&
(
PAGE_SIZE
-
1
)),
pgrem
))
return
-
EFAULT
;
return
-
EFAULT
;
size
-=
pgrem
;
size
-=
pgrem
;
(
char
*
)
buffer
+=
pgrem
;
buffer
+=
pgrem
;
ptr
+=
pgrem
;
ptr
+=
pgrem
;
if
(
ptr
>=
db
->
dmasize
)
if
(
ptr
>=
db
->
dmasize
)
ptr
=
0
;
ptr
=
0
;
...
@@ -2010,7 +2010,7 @@ static int usb_audio_ioctl_mixdev(struct inode *inode, struct file *file, unsign
...
@@ -2010,7 +2010,7 @@ static int usb_audio_ioctl_mixdev(struct inode *inode, struct file *file, unsign
strncpy
(
info
.
id
,
"USB_AUDIO"
,
sizeof
(
info
.
id
));
strncpy
(
info
.
id
,
"USB_AUDIO"
,
sizeof
(
info
.
id
));
strncpy
(
info
.
name
,
"USB Audio Class Driver"
,
sizeof
(
info
.
name
));
strncpy
(
info
.
name
,
"USB Audio Class Driver"
,
sizeof
(
info
.
name
));
info
.
modify_counter
=
ms
->
modcnt
;
info
.
modify_counter
=
ms
->
modcnt
;
if
(
copy_to_user
((
void
*
)
arg
,
&
info
,
sizeof
(
info
)))
if
(
copy_to_user
((
void
__user
*
)
arg
,
&
info
,
sizeof
(
info
)))
return
-
EFAULT
;
return
-
EFAULT
;
return
0
;
return
0
;
}
}
...
@@ -2018,7 +2018,7 @@ static int usb_audio_ioctl_mixdev(struct inode *inode, struct file *file, unsign
...
@@ -2018,7 +2018,7 @@ static int usb_audio_ioctl_mixdev(struct inode *inode, struct file *file, unsign
_old_mixer_info
info
;
_old_mixer_info
info
;
strncpy
(
info
.
id
,
"USB_AUDIO"
,
sizeof
(
info
.
id
));
strncpy
(
info
.
id
,
"USB_AUDIO"
,
sizeof
(
info
.
id
));
strncpy
(
info
.
name
,
"USB Audio Class Driver"
,
sizeof
(
info
.
name
));
strncpy
(
info
.
name
,
"USB Audio Class Driver"
,
sizeof
(
info
.
name
));
if
(
copy_to_user
((
void
*
)
arg
,
&
info
,
sizeof
(
info
)))
if
(
copy_to_user
((
void
__user
*
)
arg
,
&
info
,
sizeof
(
info
)))
return
-
EFAULT
;
return
-
EFAULT
;
return
0
;
return
0
;
}
}
...
@@ -2140,7 +2140,7 @@ static int drain_out(struct usb_audiodev *as, int nonblock)
...
@@ -2140,7 +2140,7 @@ static int drain_out(struct usb_audiodev *as, int nonblock)
/* --------------------------------------------------------------------- */
/* --------------------------------------------------------------------- */
static
ssize_t
usb_audio_read
(
struct
file
*
file
,
char
*
buffer
,
size_t
count
,
loff_t
*
ppos
)
static
ssize_t
usb_audio_read
(
struct
file
*
file
,
char
__user
*
buffer
,
size_t
count
,
loff_t
*
ppos
)
{
{
struct
usb_audiodev
*
as
=
(
struct
usb_audiodev
*
)
file
->
private_data
;
struct
usb_audiodev
*
as
=
(
struct
usb_audiodev
*
)
file
->
private_data
;
DECLARE_WAITQUEUE
(
wait
,
current
);
DECLARE_WAITQUEUE
(
wait
,
current
);
...
@@ -2208,7 +2208,7 @@ static ssize_t usb_audio_read(struct file *file, char *buffer, size_t count, lof
...
@@ -2208,7 +2208,7 @@ static ssize_t usb_audio_read(struct file *file, char *buffer, size_t count, lof
return
ret
;
return
ret
;
}
}
static
ssize_t
usb_audio_write
(
struct
file
*
file
,
const
char
*
buffer
,
size_t
count
,
loff_t
*
ppos
)
static
ssize_t
usb_audio_write
(
struct
file
*
file
,
const
char
__user
*
buffer
,
size_t
count
,
loff_t
*
ppos
)
{
{
struct
usb_audiodev
*
as
=
(
struct
usb_audiodev
*
)
file
->
private_data
;
struct
usb_audiodev
*
as
=
(
struct
usb_audiodev
*
)
file
->
private_data
;
DECLARE_WAITQUEUE
(
wait
,
current
);
DECLARE_WAITQUEUE
(
wait
,
current
);
...
@@ -2507,7 +2507,7 @@ static int usb_audio_ioctl(struct inode *inode, struct file *file, unsigned int
...
@@ -2507,7 +2507,7 @@ static int usb_audio_ioctl(struct inode *inode, struct file *file, unsigned int
abinfo
.
fragstotal
=
as
->
usbout
.
dma
.
numfrag
;
abinfo
.
fragstotal
=
as
->
usbout
.
dma
.
numfrag
;
abinfo
.
fragments
=
abinfo
.
bytes
>>
as
->
usbout
.
dma
.
fragshift
;
abinfo
.
fragments
=
abinfo
.
bytes
>>
as
->
usbout
.
dma
.
fragshift
;
spin_unlock_irqrestore
(
&
as
->
lock
,
flags
);
spin_unlock_irqrestore
(
&
as
->
lock
,
flags
);
return
copy_to_user
((
void
*
)
arg
,
&
abinfo
,
sizeof
(
abinfo
))
?
-
EFAULT
:
0
;
return
copy_to_user
((
void
__user
*
)
arg
,
&
abinfo
,
sizeof
(
abinfo
))
?
-
EFAULT
:
0
;
case
SNDCTL_DSP_GETISPACE
:
case
SNDCTL_DSP_GETISPACE
:
if
(
!
(
file
->
f_mode
&
FMODE_READ
))
if
(
!
(
file
->
f_mode
&
FMODE_READ
))
...
@@ -2520,7 +2520,7 @@ static int usb_audio_ioctl(struct inode *inode, struct file *file, unsigned int
...
@@ -2520,7 +2520,7 @@ static int usb_audio_ioctl(struct inode *inode, struct file *file, unsigned int
abinfo
.
fragstotal
=
as
->
usbin
.
dma
.
numfrag
;
abinfo
.
fragstotal
=
as
->
usbin
.
dma
.
numfrag
;
abinfo
.
fragments
=
abinfo
.
bytes
>>
as
->
usbin
.
dma
.
fragshift
;
abinfo
.
fragments
=
abinfo
.
bytes
>>
as
->
usbin
.
dma
.
fragshift
;
spin_unlock_irqrestore
(
&
as
->
lock
,
flags
);
spin_unlock_irqrestore
(
&
as
->
lock
,
flags
);
return
copy_to_user
((
void
*
)
arg
,
&
abinfo
,
sizeof
(
abinfo
))
?
-
EFAULT
:
0
;
return
copy_to_user
((
void
__user
*
)
arg
,
&
abinfo
,
sizeof
(
abinfo
))
?
-
EFAULT
:
0
;
case
SNDCTL_DSP_NONBLOCK
:
case
SNDCTL_DSP_NONBLOCK
:
file
->
f_flags
|=
O_NONBLOCK
;
file
->
f_flags
|=
O_NONBLOCK
;
...
@@ -2544,7 +2544,7 @@ static int usb_audio_ioctl(struct inode *inode, struct file *file, unsigned int
...
@@ -2544,7 +2544,7 @@ static int usb_audio_ioctl(struct inode *inode, struct file *file, unsigned int
if
(
as
->
usbin
.
dma
.
mapped
)
if
(
as
->
usbin
.
dma
.
mapped
)
as
->
usbin
.
dma
.
count
&=
as
->
usbin
.
dma
.
fragsize
-
1
;
as
->
usbin
.
dma
.
count
&=
as
->
usbin
.
dma
.
fragsize
-
1
;
spin_unlock_irqrestore
(
&
as
->
lock
,
flags
);
spin_unlock_irqrestore
(
&
as
->
lock
,
flags
);
if
(
copy_to_user
((
void
*
)
arg
,
&
cinfo
,
sizeof
(
cinfo
)))
if
(
copy_to_user
((
void
__user
*
)
arg
,
&
cinfo
,
sizeof
(
cinfo
)))
return
-
EFAULT
;
return
-
EFAULT
;
return
0
;
return
0
;
...
@@ -2558,7 +2558,7 @@ static int usb_audio_ioctl(struct inode *inode, struct file *file, unsigned int
...
@@ -2558,7 +2558,7 @@ static int usb_audio_ioctl(struct inode *inode, struct file *file, unsigned int
if
(
as
->
usbout
.
dma
.
mapped
)
if
(
as
->
usbout
.
dma
.
mapped
)
as
->
usbout
.
dma
.
count
&=
as
->
usbout
.
dma
.
fragsize
-
1
;
as
->
usbout
.
dma
.
count
&=
as
->
usbout
.
dma
.
fragsize
-
1
;
spin_unlock_irqrestore
(
&
as
->
lock
,
flags
);
spin_unlock_irqrestore
(
&
as
->
lock
,
flags
);
if
(
copy_to_user
((
void
*
)
arg
,
&
cinfo
,
sizeof
(
cinfo
)))
if
(
copy_to_user
((
void
__user
*
)
arg
,
&
cinfo
,
sizeof
(
cinfo
)))
return
-
EFAULT
;
return
-
EFAULT
;
return
0
;
return
0
;
...
...
drivers/usb/class/bluetty.c
View file @
ab8c77a9
...
@@ -484,7 +484,7 @@ static int bluetooth_write (struct tty_struct * tty, int from_user, const unsign
...
@@ -484,7 +484,7 @@ static int bluetooth_write (struct tty_struct * tty, int from_user, const unsign
retval
=
-
ENOMEM
;
retval
=
-
ENOMEM
;
goto
exit
;
goto
exit
;
}
}
if
(
copy_from_user
(
temp_buffer
,
buf
,
count
))
{
if
(
copy_from_user
(
temp_buffer
,
(
void
__user
*
)
buf
,
count
))
{
retval
=
-
EFAULT
;
retval
=
-
EFAULT
;
goto
exit
;
goto
exit
;
}
}
...
...
drivers/usb/class/cdc-acm.c
View file @
ab8c77a9
...
@@ -388,7 +388,7 @@ static int acm_tty_write(struct tty_struct *tty, int from_user, const unsigned c
...
@@ -388,7 +388,7 @@ static int acm_tty_write(struct tty_struct *tty, int from_user, const unsigned c
count
=
(
count
>
acm
->
writesize
)
?
acm
->
writesize
:
count
;
count
=
(
count
>
acm
->
writesize
)
?
acm
->
writesize
:
count
;
if
(
from_user
)
{
if
(
from_user
)
{
if
(
copy_from_user
(
acm
->
writeurb
->
transfer_buffer
,
buf
,
count
))
if
(
copy_from_user
(
acm
->
writeurb
->
transfer_buffer
,
(
void
__user
*
)
buf
,
count
))
return
-
EFAULT
;
return
-
EFAULT
;
}
else
}
else
memcpy
(
acm
->
writeurb
->
transfer_buffer
,
buf
,
count
);
memcpy
(
acm
->
writeurb
->
transfer_buffer
,
buf
,
count
);
...
...
drivers/usb/class/usb-midi.c
View file @
ab8c77a9
...
@@ -642,7 +642,7 @@ static loff_t usb_midi_llseek(struct file *file, loff_t offset, int origin)
...
@@ -642,7 +642,7 @@ static loff_t usb_midi_llseek(struct file *file, loff_t offset, int origin)
*
*
**/
**/
static
ssize_t
usb_midi_read
(
struct
file
*
file
,
char
*
buffer
,
size_t
count
,
loff_t
*
ppos
)
static
ssize_t
usb_midi_read
(
struct
file
*
file
,
char
__user
*
buffer
,
size_t
count
,
loff_t
*
ppos
)
{
{
struct
usb_mididev
*
m
=
(
struct
usb_mididev
*
)
file
->
private_data
;
struct
usb_mididev
*
m
=
(
struct
usb_mididev
*
)
file
->
private_data
;
struct
midi_in_endpoint
*
ep
=
m
->
min
.
ep
;
struct
midi_in_endpoint
*
ep
=
m
->
min
.
ep
;
...
@@ -725,7 +725,7 @@ static ssize_t usb_midi_read(struct file *file, char *buffer, size_t count, loff
...
@@ -725,7 +725,7 @@ static ssize_t usb_midi_read(struct file *file, char *buffer, size_t count, loff
*
*
**/
**/
static
ssize_t
usb_midi_write
(
struct
file
*
file
,
const
char
*
buffer
,
size_t
count
,
loff_t
*
ppos
)
static
ssize_t
usb_midi_write
(
struct
file
*
file
,
const
char
__user
*
buffer
,
size_t
count
,
loff_t
*
ppos
)
{
{
struct
usb_mididev
*
m
=
(
struct
usb_mididev
*
)
file
->
private_data
;
struct
usb_mididev
*
m
=
(
struct
usb_mididev
*
)
file
->
private_data
;
ssize_t
ret
;
ssize_t
ret
;
...
...
drivers/usb/class/usblp.c
View file @
ab8c77a9
...
@@ -455,7 +455,7 @@ static int usblp_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
...
@@ -455,7 +455,7 @@ static int usblp_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
if
(
length
>
_IOC_SIZE
(
cmd
))
if
(
length
>
_IOC_SIZE
(
cmd
))
length
=
_IOC_SIZE
(
cmd
);
/* truncate */
length
=
_IOC_SIZE
(
cmd
);
/* truncate */
if
(
copy_to_user
((
unsigned
cha
r
*
)
arg
,
if
(
copy_to_user
((
void
__use
r
*
)
arg
,
usblp
->
device_id_string
,
usblp
->
device_id_string
,
(
unsigned
long
)
length
))
{
(
unsigned
long
)
length
))
{
retval
=
-
EFAULT
;
retval
=
-
EFAULT
;
...
@@ -479,7 +479,7 @@ static int usblp_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
...
@@ -479,7 +479,7 @@ static int usblp_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
twoints
[
1
]
|=
(
1
<<
i
);
twoints
[
1
]
|=
(
1
<<
i
);
}
}
if
(
copy_to_user
((
unsigned
cha
r
*
)
arg
,
if
(
copy_to_user
((
void
__use
r
*
)
arg
,
(
unsigned
char
*
)
twoints
,
(
unsigned
char
*
)
twoints
,
sizeof
(
twoints
)))
{
sizeof
(
twoints
)))
{
retval
=
-
EFAULT
;
retval
=
-
EFAULT
;
...
@@ -540,7 +540,7 @@ static int usblp_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
...
@@ -540,7 +540,7 @@ static int usblp_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
twoints
[
0
]
=
usblp
->
dev
->
bus
->
busnum
;
twoints
[
0
]
=
usblp
->
dev
->
bus
->
busnum
;
twoints
[
1
]
=
usblp
->
dev
->
devnum
;
twoints
[
1
]
=
usblp
->
dev
->
devnum
;
if
(
copy_to_user
((
unsigned
cha
r
*
)
arg
,
if
(
copy_to_user
((
void
__use
r
*
)
arg
,
(
unsigned
char
*
)
twoints
,
(
unsigned
char
*
)
twoints
,
sizeof
(
twoints
)))
{
sizeof
(
twoints
)))
{
retval
=
-
EFAULT
;
retval
=
-
EFAULT
;
...
@@ -560,7 +560,7 @@ static int usblp_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
...
@@ -560,7 +560,7 @@ static int usblp_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
twoints
[
0
]
=
usblp
->
dev
->
descriptor
.
idVendor
;
twoints
[
0
]
=
usblp
->
dev
->
descriptor
.
idVendor
;
twoints
[
1
]
=
usblp
->
dev
->
descriptor
.
idProduct
;
twoints
[
1
]
=
usblp
->
dev
->
descriptor
.
idProduct
;
if
(
copy_to_user
((
unsigned
cha
r
*
)
arg
,
if
(
copy_to_user
((
void
__use
r
*
)
arg
,
(
unsigned
char
*
)
twoints
,
(
unsigned
char
*
)
twoints
,
sizeof
(
twoints
)))
{
sizeof
(
twoints
)))
{
retval
=
-
EFAULT
;
retval
=
-
EFAULT
;
...
@@ -584,7 +584,7 @@ static int usblp_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
...
@@ -584,7 +584,7 @@ static int usblp_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
goto
done
;
goto
done
;
}
}
status
=
*
usblp
->
statusbuf
;
status
=
*
usblp
->
statusbuf
;
if
(
copy_to_user
((
int
*
)
arg
,
&
status
,
sizeof
(
int
)))
if
(
copy_to_user
((
void
__user
*
)
arg
,
&
status
,
sizeof
(
int
)))
retval
=
-
EFAULT
;
retval
=
-
EFAULT
;
break
;
break
;
...
@@ -597,7 +597,7 @@ static int usblp_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
...
@@ -597,7 +597,7 @@ static int usblp_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
return
retval
;
return
retval
;
}
}
static
ssize_t
usblp_write
(
struct
file
*
file
,
const
char
*
buffer
,
size_t
count
,
loff_t
*
ppos
)
static
ssize_t
usblp_write
(
struct
file
*
file
,
const
char
__user
*
buffer
,
size_t
count
,
loff_t
*
ppos
)
{
{
DECLARE_WAITQUEUE
(
wait
,
current
);
DECLARE_WAITQUEUE
(
wait
,
current
);
struct
usblp
*
usblp
=
file
->
private_data
;
struct
usblp
*
usblp
=
file
->
private_data
;
...
@@ -682,7 +682,7 @@ static ssize_t usblp_write(struct file *file, const char *buffer, size_t count,
...
@@ -682,7 +682,7 @@ static ssize_t usblp_write(struct file *file, const char *buffer, size_t count,
return
count
;
return
count
;
}
}
static
ssize_t
usblp_read
(
struct
file
*
file
,
char
*
buffer
,
size_t
count
,
loff_t
*
ppos
)
static
ssize_t
usblp_read
(
struct
file
*
file
,
char
__user
*
buffer
,
size_t
count
,
loff_t
*
ppos
)
{
{
struct
usblp
*
usblp
=
file
->
private_data
;
struct
usblp
*
usblp
=
file
->
private_data
;
DECLARE_WAITQUEUE
(
wait
,
current
);
DECLARE_WAITQUEUE
(
wait
,
current
);
...
...
Write
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