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| author | Hans Verkuil <hverkuil@xs4all.nl> | 2010-09-20 17:24:30 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-10-21 01:06:14 -0200 |
| commit | 97397687886aa8ecd4ec603fab9e70e970c11597 (patch) | |
| tree | 339d460b43d2ec7206c9d147d2ad6f8fcbfa3870 /drivers/media/video/videobuf-dma-contig.c | |
| parent | ee6869afc922a9849979e49bb3bbcad794872fcb (diff) | |
| download | blackbird-op-linux-97397687886aa8ecd4ec603fab9e70e970c11597.tar.gz blackbird-op-linux-97397687886aa8ecd4ec603fab9e70e970c11597.zip | |
V4L/DVB: videobuf: prepare to make locking optional in videobuf
Currently videobuf uses the vb_lock mutex to lock its data structures.
But this locking will (optionally) move into the v4l2 core, which means
that in that case vb_lock shouldn't be used since the external lock is already
held.
Prepare for this by adding a pointer to such an external mutex and
don't lock if that pointer is set.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/videobuf-dma-contig.c')
| -rw-r--r-- | drivers/media/video/videobuf-dma-contig.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/media/video/videobuf-dma-contig.c b/drivers/media/video/videobuf-dma-contig.c index 6ff9e4bac3ea..047054f79601 100644 --- a/drivers/media/video/videobuf-dma-contig.c +++ b/drivers/media/video/videobuf-dma-contig.c @@ -63,7 +63,7 @@ static void videobuf_vm_close(struct vm_area_struct *vma) struct videobuf_dma_contig_memory *mem; dev_dbg(q->dev, "munmap %p q=%p\n", map, q); - mutex_lock(&q->vb_lock); + videobuf_queue_lock(q); /* We need first to cancel streams, before unmapping */ if (q->streaming) @@ -103,7 +103,7 @@ static void videobuf_vm_close(struct vm_area_struct *vma) kfree(map); - mutex_unlock(&q->vb_lock); + videobuf_queue_unlock(q); } } |
