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@xxxxxxxxx>
---
drivers/staging/comedi/comedi_fops.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c
index 224af2b..ab6cbc8 100644
--- a/drivers/staging/comedi/comedi_fops.c
+++ b/drivers/staging/comedi/comedi_fops.c
@@ -1642,7 +1642,7 @@ 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;
@@ -1679,7 +1679,7 @@ 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;
@@ -1714,7 +1714,7 @@ 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;
@@ -1748,7 +1748,7 @@ 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;
--
2.1.1
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