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@xxxxxxxxxxxxxx>
Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxx>
Cc: Pawel Osciak <pawel@xxxxxxxxxx>
---
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 b03d74e..effefa0 100644
--- a/drivers/media/video/mem2mem_testdev.c
+++ b/drivers/media/video/mem2mem_testdev.c
@@ -795,10 +795,24 @@ 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)
--
1.7.5.4
--
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