[media] media: davinci: vpif_capture: release buffers in case start_streaming() call...

this patch adds support to release the buffer by calling
vb2_buffer_done(), with state marked as VB2_BUF_STATE_QUEUED
if start_streaming() call back fails.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

diff --git a/drivers/media/platform/davinci/vpif_capture.c b/drivers/media/platform/davinci/vpif_capture.c
index 8572efe..fd384d0 100644 (file)
--- a/drivers/media/platform/davinci/vpif_capture.c
+++ b/drivers/media/platform/davinci/vpif_capture.c
@@ -231,24 +231,15 @@ static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
        struct channel_obj *ch = vb2_get_drv_priv(vq);
        struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
        struct vpif_params *vpif = &ch->vpifparams;
-       unsigned long addr = 0;
-       unsigned long flags;
+       struct vpif_cap_buffer *buf, *tmp;
+       unsigned long addr, flags;
        int ret;
 
        spin_lock_irqsave(&common->irqlock, flags);
 
-       /* Get the next frame from the buffer queue */
-       common->cur_frm = common->next_frm = list_entry(common->dma_queue.next,
-                                   struct vpif_cap_buffer, list);
-       /* Remove buffer from the buffer queue */
-       list_del(&common->cur_frm->list);
-       spin_unlock_irqrestore(&common->irqlock, flags);
-       /* Mark state of the current frame to active */
-       common->cur_frm->vb.state = VB2_BUF_STATE_ACTIVE;
        /* Initialize field_id and started member */
        ch->field_id = 0;
        common->started = 1;
-       addr = vb2_dma_contig_plane_dma_addr(&common->cur_frm->vb, 0);
 
        /* Calculate the offset for Y and C data in the buffer */
        vpif_calculate_offsets(ch);
@@ -259,7 +250,8 @@ static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
            (!vpif->std_info.frm_fmt &&
             (common->fmt.fmt.pix.field == V4L2_FIELD_NONE))) {
                vpif_dbg(1, debug, "conflict in field format and std format\n");
-               return -EINVAL;
+               ret = -EINVAL;
+               goto err;
        }
 
        /* configure 1 or 2 channel mode */
@@ -268,7 +260,7 @@ static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
                        setup_input_channel_mode(vpif->std_info.ycmux_mode);
                if (ret < 0) {
                        vpif_dbg(1, debug, "can't set vpif channel mode\n");
-                       return ret;
+                       goto err;
                }
        }
 
@@ -277,12 +269,23 @@ static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
 
        if (ret < 0) {
                vpif_dbg(1, debug, "can't set video params\n");
-               return ret;
+               goto err;
        }
 
        common->started = ret;
        vpif_config_addr(ch, ret);
 
+       /* Get the next frame from the buffer queue */
+       common->cur_frm = common->next_frm = list_entry(common->dma_queue.next,
+                                   struct vpif_cap_buffer, list);
+       /* Remove buffer from the buffer queue */
+       list_del(&common->cur_frm->list);
+       spin_unlock_irqrestore(&common->irqlock, flags);
+       /* Mark state of the current frame to active */
+       common->cur_frm->vb.state = VB2_BUF_STATE_ACTIVE;
+
+       addr = vb2_dma_contig_plane_dma_addr(&common->cur_frm->vb, 0);
+
        common->set_addr(addr + common->ytop_off,
                         addr + common->ybtm_off,
                         addr + common->ctop_off,
@@ -306,6 +309,14 @@ static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
        }
 
        return 0;
+
+err:
+       list_for_each_entry_safe(buf, tmp, &common->dma_queue, list) {
+               list_del(&buf->list);
+               vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
+       }
+
+       return ret;
 }
 
 /* abort streaming and wait for last buffer */