tree b242f6745723c112f35224b6e8cc9e20824e4c12
parent 36fd97884daf4e30b556a6c59b58db19a06d58af
author Jesper Juhl <jj@chaosbits.net> 1294001844 -0300
committer Mauro Carvalho Chehab <mchehab@redhat.com> 1295444745 -0200

[media] media, tlg2300: Fix memory leak in alloc_bulk_urbs_generic()

Hi,

While reading
drivers/media/video/tlg2300/pd-video.c::alloc_bulk_urbs_generic() I
noticed that

 - We don't free the memory allocated to 'urb' if the call to
   usb_alloc_coherent() fails.
 - If the 'num' argument to the function is ever <= 0 we'll return an
   uninitialized variable 'i' to the caller.

The following patch addresses both of the above by a) calling
usb_free_urb() when usb_alloc_coherent() fails and by explicitly
initializing 'i' to zero.
I also moved the variables 'mem' and 'urb' inside the for loop. This does
not actually make any difference, it just seemed more correct to me to let
variables exist only in the innermost scope they are used.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Acked-by: Huang Shijie <shijie8@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>