From e99f0115e56ce4c4cda269cd21b25f7e14fa548f Mon Sep 17 00:00:00 2001 From: William Towle Date: Mon, 26 Jan 2015 14:08:40 -0300 Subject: [PATCH] [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 Signed-off-by: Guennadi Liakhovetski Signed-off-by: Mauro Carvalho Chehab --- 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 30dc707b7946..279ab9f6ae38 100644 --- a/drivers/media/platform/soc_camera/rcar_vin.c +++ b/drivers/media/platform/soc_camera/rcar_vin.c @@ -826,72 +826,36 @@ 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 = vb2_ops_wait_prepare, -- 2.20.1