[PATCH 2/2] media: rcar_vin: move buffer management to .stop_streaming handler
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. After the refactoring, the buf_init and buf_cleanup functions were found to contain only initialisation/release steps as are carried out elsewhere if omitted; these functions and references were removed. Signed-off-by: William Towle william.to...@codethink.co.uk --- drivers/media/platform/soc_camera/rcar_vin.c | 62 ++ 1 file changed, 13 insertions(+), 49 deletions(-) diff --git a/drivers/media/platform/soc_camera/rcar_vin.c b/drivers/media/platform/soc_camera/rcar_vin.c index 89c409b..aa25a3b 100644 --- a/drivers/media/platform/soc_camera/rcar_vin.c +++ b/drivers/media/platform/soc_camera/rcar_vin.c @@ -480,72 +480,36 @@ static void rcar_vin_wait_stop_streaming(struct rcar_vin_priv *priv) } } -static void rcar_vin_videobuf_release(struct vb2_buffer *vb) +static void rcar_vin_stop_streaming(struct vb2_queue *vq) { - struct soc_camera_device *icd = soc_camera_from_vb2q(vb-vb2_queue); + struct soc_camera_device *icd = soc_camera_from_vb2q(vq); 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; + struct list_head *buf_head, *tmp; + int i; spin_lock_irq(priv-lock); + rcar_vin_wait_stop_streaming(priv); - /* 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], + if (priv-queue_buf[i]) { + vb2_buffer_done(priv-queue_buf[i], VB2_BUF_STATE_ERROR); - priv-queue_buf[i] = NULL; - } + priv-queue_buf[i] = NULL; } - } else { - list_del_init(to_buf_list(vb)); } - spin_unlock_irq(priv-lock); -} - -static int rcar_vin_videobuf_init(struct vb2_buffer *vb) -{ - INIT_LIST_HEAD(to_buf_list(vb)); - return 0; -} - -static void rcar_vin_stop_streaming(struct vb2_queue *vq) -{ - struct soc_camera_device *icd = soc_camera_from_vb2q(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; - - spin_lock_irq(priv-lock); - - rcar_vin_wait_stop_streaming(priv); - list_for_each_safe(buf_head, tmp, priv-capture) + 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); } static struct vb2_ops rcar_vin_vb2_ops = { .queue_setup= rcar_vin_videobuf_setup, - .buf_init = rcar_vin_videobuf_init, - .buf_cleanup= rcar_vin_videobuf_release, .buf_queue = rcar_vin_videobuf_queue, .stop_streaming = rcar_vin_stop_streaming, .wait_prepare = soc_camera_unlock, -- 1.7.10.4 -- To unsubscribe from this list: send the line unsubscribe linux-media in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
[PATCH 2/2] media: rcar_vin: move buffer management to .stop_streaming handler
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.to...@codethink.co.uk --- 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 -- To unsubscribe from this list: send the line unsubscribe linux-media in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
[PATCH 2/2] media: rcar_vin: move buffer management to .stop_streaming handler
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.to...@codethink.co.uk --- 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 -- To unsubscribe from this list: send the line unsubscribe linux-media in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html