This commit moves the "buffer in use" logic from the .buf_cleanup
handler into .stop_streaming, based on advice that this is its
proper logical home.
By ensuring the list of pointers in priv->queue_buf[] is managed
as soon as possible, we avoid warnings concerning buffers in ACTIVE
state when the system cleans up after streaming stops. This fixes a
problem with modification of buffers after their content has been
cleared for passing to userspace.
Signed-off-by: William Towle <william.towle@xxxxxxxxxxxxxxx>
---
drivers/media/platform/soc_camera/rcar_vin.c | 47 +++++++++-----------------
1 file changed, 16 insertions(+), 31 deletions(-)
diff --git a/drivers/media/platform/soc_camera/rcar_vin.c b/drivers/media/platform/soc_camera/rcar_vin.c
index 89c409b..022fa9d 100644
--- a/drivers/media/platform/soc_camera/rcar_vin.c
+++ b/drivers/media/platform/soc_camera/rcar_vin.c
@@ -485,37 +485,10 @@ static void rcar_vin_videobuf_release(struct vb2_buffer *vb)
struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
struct rcar_vin_priv *priv = ici->priv;
- unsigned int i;
- int buf_in_use = 0;
spin_lock_irq(&priv->lock);
- /* Is the buffer in use by the VIN hardware? */
- for (i = 0; i < MAX_BUFFER_NUM; i++) {
- if (priv->queue_buf[i] == vb) {
- buf_in_use = 1;
- break;
- }
- }
-
- if (buf_in_use) {
- rcar_vin_wait_stop_streaming(priv);
-
- /*
- * Capturing has now stopped. The buffer we have been asked
- * to release could be any of the current buffers in use, so
- * release all buffers that are in use by HW
- */
- for (i = 0; i < MAX_BUFFER_NUM; i++) {
- if (priv->queue_buf[i]) {
- vb2_buffer_done(priv->queue_buf[i],
- VB2_BUF_STATE_ERROR);
- priv->queue_buf[i] = NULL;
- }
- }
- } else {
- list_del_init(to_buf_list(vb));
- }
+ list_del_init(to_buf_list(vb));
spin_unlock_irq(&priv->lock);
}
@@ -532,13 +505,25 @@ static void rcar_vin_stop_streaming(struct vb2_queue *vq)
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
struct rcar_vin_priv *priv = ici->priv;
struct list_head *buf_head, *tmp;
+ int i;
spin_lock_irq(&priv->lock);
-
rcar_vin_wait_stop_streaming(priv);
- list_for_each_safe(buf_head, tmp, &priv->capture)
- list_del_init(buf_head);
+ for (i = 0; i < MAX_BUFFER_NUM; i++) {
+ if (priv->queue_buf[i]) {
+ vb2_buffer_done(priv->queue_buf[i],
+ VB2_BUF_STATE_ERROR);
+ priv->queue_buf[i] = NULL;
+ }
+ }
+
+ list_for_each_safe(buf_head, tmp, &priv->capture) {
+ vb2_buffer_done(&list_entry(buf_head,
+ struct rcar_vin_buffer, list)->vb,
+ VB2_BUF_STATE_ERROR);
+ list_del_init(buf_head);
+ }
spin_unlock_irq(&priv->lock);
}
--
1.7.10.4
--
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