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

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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>

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Brandon Philips 2008-04-02 18:10:59 -03:00 • committed by Mauro Carvalho Chehab

parent aa9dbac426

commit 78718e5d44

1 changed files with 81 additions and 232 deletions

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drivers/media/video/vivi.c

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