tree e4895d60a050e15d6c4b21aa7dbc4090199efdf3
parent 08bff03ed697a583612b62a6ac566bd5bce98012
author Hans Verkuil <hverkuil@xs4all.nl> 1285502486 -0300
committer Mauro Carvalho Chehab <mchehab@redhat.com> 1287630374 -0200

V4L/DVB: videobuf: add queue argument to videobuf_waiton()

videobuf_waiton() must unlock and relock ext_lock if it has to wait.
For that to happen it needs the videobuf_queue pointer.

Don't attempt to unlock/relock q->ext_lock unless it was locked in the
first place.

vb->state has to be protected by a spinlock to be safe.

This patch is based on code from Mauro Carvalho Chehab <mchehab@redhat.com>.

[mchehab@redhat.com: add extra argument to a few missing places]
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>