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staging: comedi: widen subdevice number argument in ioctl handlers 

For the `COMEDI_LOCK`, `COMEDI_UNLOCK`, `COMEDI_CANCEL`, and
`COMEDI_POLL` ioctls the third argument is a comedi subdevice number.
This is passed as an `unsigned long`, but when it is passed down to the
ioctl command-specific handler functions `do_lock_ioctl()`,
`do_unlock_ioctl()`, `do_cancel_ioctl()`, and `do_poll_ioctl()`, the
value has been narrowed to an `unsigned int`.  Pass through the argument
as an `unsigned long` to avoid truncating the value on 64-bit
architectures.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ian Abbott 2014-10-28 17:15:47 +00:00 committed by Greg Kroah-Hartman
parent 7e74783a9d
commit c1a6eac169
1 changed files with 4 additions and 4 deletions
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8
drivers/staging/comedi/comedi_fops.c
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@ -1641,7 +1641,7 @@ static int do_cmdtest_ioctl(struct comedi_device *dev,
*/
static int do_lock_ioctl(struct comedi_device *dev, unsigned int arg,
static int do_lock_ioctl(struct comedi_device *dev, unsigned long arg,
void *file)
{
int ret = 0;
@ -1678,7 +1678,7 @@ static int do_lock_ioctl(struct comedi_device *dev, unsigned int arg,
This function isn't protected by the semaphore, since
we already own the lock.
*/
static int do_unlock_ioctl(struct comedi_device *dev, unsigned int arg,
static int do_unlock_ioctl(struct comedi_device *dev, unsigned long arg,
void *file)
{
struct comedi_subdevice *s;
@ -1713,7 +1713,7 @@ static int do_unlock_ioctl(struct comedi_device *dev, unsigned int arg,
nothing
*/
static int do_cancel_ioctl(struct comedi_device *dev, unsigned int arg,
static int do_cancel_ioctl(struct comedi_device *dev, unsigned long arg,
void *file)
{
struct comedi_subdevice *s;
@ -1750,7 +1750,7 @@ static int do_cancel_ioctl(struct comedi_device *dev, unsigned int arg,
nothing
*/
static int do_poll_ioctl(struct comedi_device *dev, unsigned int arg,
static int do_poll_ioctl(struct comedi_device *dev, unsigned long arg,
void *file)
{
struct comedi_subdevice *s;