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[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>
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1 changed files with 14 additions and 0 deletions
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@ -793,10 +793,24 @@ static void m2mtest_buf_queue(struct vb2_buffer *vb)
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v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
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}
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static void m2mtest_wait_prepare(struct vb2_queue *q)
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{
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struct m2mtest_ctx *ctx = vb2_get_drv_priv(q);
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m2mtest_unlock(ctx);
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}
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static void m2mtest_wait_finish(struct vb2_queue *q)
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{
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struct m2mtest_ctx *ctx = vb2_get_drv_priv(q);
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m2mtest_lock(ctx);
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}
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static struct vb2_ops m2mtest_qops = {
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.queue_setup = m2mtest_queue_setup,
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.buf_prepare = m2mtest_buf_prepare,
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.buf_queue = m2mtest_buf_queue,
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.wait_prepare = m2mtest_wait_prepare,
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.wait_finish = m2mtest_wait_finish,
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};
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static int queue_init(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq)
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