tree 6f229f1abbd2655433d22f6d054fda4515d4a8da
parent aa9dbac426d263b5b86d1684993d18ae187d7588
author Brandon Philips <brandon@ifup.org> 1207170659 -0300
committer Mauro Carvalho Chehab <mchehab@infradead.org> 1209056877 -0300

V4L/DVB (7492): vivi: Simplify the vivi driver and avoid deadlocks

vivi previously had a very complex queuing system and held spinlocks while
doing copy_to_user, kmalloc, etc.  This caused the driver to easily deadlock
when a multi-threaded application used it and revealed bugs in videobuf too.

This replaces the copy_to_user with memcpy since we were never copying to user
space addresses.  And makes the kmalloc atomic.

Signed-off-by: Brandon Philips <bphilips@suse.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>