[media] mem2mem_testdev: return pending buffers in stop_streaming()

To keep the vb2 buffer administration in balance stop_streaming() must
return any pending buffers to the vb2 framework.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

diff --git a/drivers/media/platform/mem2mem_testdev.c b/drivers/media/platform/mem2mem_testdev.c
index 8e2aed2..1ba1a83 100644 (file)
--- a/drivers/media/platform/mem2mem_testdev.c
+++ b/drivers/media/platform/mem2mem_testdev.c
@@ -768,10 +768,31 @@ static void m2mtest_buf_queue(struct vb2_buffer *vb)
        v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vb);
 }
 
+static int m2mtest_stop_streaming(struct vb2_queue *q)
+{
+       struct m2mtest_ctx *ctx = vb2_get_drv_priv(q);
+       struct vb2_buffer *vb;
+       unsigned long flags;
+
+       for (;;) {
+               if (V4L2_TYPE_IS_OUTPUT(q->type))
+                       vb = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
+               else
+                       vb = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
+               if (vb == NULL)
+                       return 0;
+               spin_lock_irqsave(&ctx->dev->irqlock, flags);
+               v4l2_m2m_buf_done(vb, VB2_BUF_STATE_ERROR);
+               spin_unlock_irqrestore(&ctx->dev->irqlock, flags);
+       }
+       return 0;
+}
+
 static struct vb2_ops m2mtest_qops = {
        .queue_setup     = m2mtest_queue_setup,
        .buf_prepare     = m2mtest_buf_prepare,
        .buf_queue       = m2mtest_buf_queue,
+       .stop_streaming  = m2mtest_stop_streaming,
        .wait_prepare    = vb2_ops_wait_prepare,
        .wait_finish     = vb2_ops_wait_finish,
 };