staging: comedi: comedi_fops: rename the __user *cmd param in do_cmd_ioctl
This parameter is actually the unsigned long arg passed in the ioctl.
comedi_unlocked_ioctl() casts it as a (struct comedi_cmd __user *)
when calling do_cmd_ioctl(). Rename the variable to keep this clear.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Ian Abbott <abbotti@mev.co.uk> Acked-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>