[PATCH] i4l:add some checks for valid drvid and driver pointer
[PATCH] i4l:add some checks for valid drvid and driver pointer

If all drivers go away before all ISDN network interfaces are closed we got
a OOps on removing interfaces, this patch avoid it.

Signed-off-by: Karsten Keil <90bd3ab5dfafb0210c2bd99c94885684b79eea73@suse.de>
Signed-off-by: Linus Torvalds <69652caca27c8b940640ad396ab71f93cacec34f@osdl.org>

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