V4L/DVB (13239): saa7146: fix memory leakage in pagetable-handling
V4L/DVB (13239): saa7146: fix memory leakage in pagetable-handling

In buffer_release() the previously allocated pagetables are not
freed,  which might result in a memory leak in certain application
use-cases, where the frame format is changed from planar format to
non-planar format. The fix explicitely frees the page tables when a
format change is done and when buffer_release() is called.

Signed-off-by: Johann Friedrichs <331f4462ad52bc103e00f8aca26d06a38bf7e39b@web.de>
Signed-off-by: Michael Hunold <dc2d9005a77833633915b99804fc714fce37db5e@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <ad86ba2154032c9f55743a190faa2459a9d61d42@redhat.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas