diff options
| author | Michael Olbrich <m.olbrich@pengutronix.de> | 2011-07-12 09:46:44 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-09-26 08:14:46 -0300 |
| commit | 0f910bf0008c54b33da5691278c8ee8e8700ac48 (patch) | |
| tree | 85fbb6f38254da3daa43482d8e8708d95d12f2ae /drivers/media/video/mem2mem_testdev.c | |
| parent | 0689133b7fadd2e10f4bddca36c895223a541c6c (diff) | |
[media] v4l: mem2mem: add wait_{prepare,finish} ops to m2m_testdev
These are necessary to prevent dead-locks e.g. if one thread waits
in dqbuf at one end and another tries to queue a buffer at the
other end.
Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: Pawel Osciak <pawel@osciak.com>
Acked-by: Pawel Osciak <pawel@osciak.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/mem2mem_testdev.c')
| -rw-r--r-- | drivers/media/video/mem2mem_testdev.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/media/video/mem2mem_testdev.c b/drivers/media/video/mem2mem_testdev.c index 0d0c0d5ac3a4..9594b52f8605 100644 --- a/drivers/media/video/mem2mem_testdev.c +++ b/drivers/media/video/mem2mem_testdev.c @@ -793,10 +793,24 @@ static void m2mtest_buf_queue(struct vb2_buffer *vb) v4l2_m2m_buf_queue(ctx->m2m_ctx, vb); } +static void m2mtest_wait_prepare(struct vb2_queue *q) +{ + struct m2mtest_ctx *ctx = vb2_get_drv_priv(q); + m2mtest_unlock(ctx); +} + +static void m2mtest_wait_finish(struct vb2_queue *q) +{ + struct m2mtest_ctx *ctx = vb2_get_drv_priv(q); + m2mtest_lock(ctx); +} + static struct vb2_ops m2mtest_qops = { .queue_setup = m2mtest_queue_setup, .buf_prepare = m2mtest_buf_prepare, .buf_queue = m2mtest_buf_queue, + .wait_prepare = m2mtest_wait_prepare, + .wait_finish = m2mtest_wait_finish, }; static int queue_init(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq) |