Re: [RFC PATCH 5/5] media: rcar_vin: move buffer management to .stop_streaming handler

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Hello.

On 12/18/2014 05:50 PM, Ben Hutchings wrote:

From: William Towle <william.towle@xxxxxxxxxxxxxxx>

Move the buffer state test in the .buf_cleanup handler into
.stop_streaming so that a) the vb2_queue API is not subverted, and
b) tracking of active-state buffers via priv->queue_buf[] is handled
as early as is possible

Signed-off-by: William Towle <william.towle@xxxxxxxxxxxxxxx>
---
  drivers/media/platform/soc_camera/rcar_vin.c |   36 ++++++++++----------------
  1 file changed, 14 insertions(+), 22 deletions(-)

diff --git a/drivers/media/platform/soc_camera/rcar_vin.c b/drivers/media/platform/soc_camera/rcar_vin.c
index 20dbedf..bf60074 100644
--- a/drivers/media/platform/soc_camera/rcar_vin.c
+++ b/drivers/media/platform/soc_camera/rcar_vin.c
[...]
@@ -533,8 +513,20 @@ static void rcar_vin_stop_streaming(struct vb2_queue *vq)
  	rcar_vin_wait_stop_streaming(priv);

  	for (i = 0; i < vq->num_buffers; ++i)
-		if (vq->bufs[i]->state == VB2_BUF_STATE_ACTIVE)
+		if (vq->bufs[i]->state == VB2_BUF_STATE_ACTIVE) {
+			int j;
+
+			/*  Is this a buffer we have told the
+			 *  hardware about? Update the associated
+			 *  list, if so
+			 */
+			for (j = 0; j < MAX_BUFFER_NUM; j++) {
+				if (priv->queue_buf[j] == vq->bufs[i]) {
+					priv->queue_buf[j] = NULL;
+				}

   Don't need {} here.

+			}
  			vb2_buffer_done(vq->bufs[i], VB2_BUF_STATE_ERROR);
+		}

WBR, Sergei

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