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>

---
 linux/drivers/media/video/vivi.c |  317 +++++++++------------------------------
 1 file changed, 81 insertions(+), 236 deletions(-)

0 files changed, 0 insertions, 0 deletions