diff options
Diffstat (limited to 'drivers/media/usb')
-rw-r--r-- | drivers/media/usb/au0828/au0828-core.c | 21 |
1 files changed, 9 insertions, 12 deletions
diff --git a/drivers/media/usb/au0828/au0828-core.c b/drivers/media/usb/au0828/au0828-core.c index 8c0494042d06..739df61cec4f 100644 --- a/drivers/media/usb/au0828/au0828-core.c +++ b/drivers/media/usb/au0828/au0828-core.c @@ -149,9 +149,11 @@ static void au0828_unregister_media_device(struct au0828_dev *dev) } /* clear enable_source, disable_source */ + mutex_lock(&mdev->graph_mutex); dev->media_dev->source_priv = NULL; dev->media_dev->enable_source = NULL; dev->media_dev->disable_source = NULL; + mutex_unlock(&mdev->graph_mutex); media_device_unregister(dev->media_dev); media_device_cleanup(dev->media_dev); @@ -274,6 +276,7 @@ create_link: } } +/* Callers should hold graph_mutex */ static int au0828_enable_source(struct media_entity *entity, struct media_pipeline *pipe) { @@ -287,8 +290,6 @@ static int au0828_enable_source(struct media_entity *entity, if (!mdev) return -ENODEV; - mutex_lock(&mdev->graph_mutex); - dev = mdev->source_priv; /* @@ -415,12 +416,12 @@ static int au0828_enable_source(struct media_entity *entity, dev->active_source->name, dev->active_sink->name, dev->active_link_owner->name, ret); end: - mutex_unlock(&mdev->graph_mutex); pr_debug("au0828_enable_source() end %s %d %d\n", entity->name, entity->function, ret); return ret; } +/* Callers should hold graph_mutex */ static void au0828_disable_source(struct media_entity *entity) { int ret = 0; @@ -430,13 +431,10 @@ static void au0828_disable_source(struct media_entity *entity) if (!mdev) return; - mutex_lock(&mdev->graph_mutex); dev = mdev->source_priv; - if (!dev->active_link) { - ret = -ENODEV; - goto end; - } + if (!dev->active_link) + return; /* link is active - stop pipeline from source (tuner) */ if (dev->active_link->sink->entity == dev->active_sink && @@ -446,7 +444,7 @@ static void au0828_disable_source(struct media_entity *entity) * has active pipeline */ if (dev->active_link_owner != entity) - goto end; + return; __media_pipeline_stop(entity); ret = __media_entity_setup_link(dev->active_link, 0); if (ret) @@ -461,9 +459,6 @@ static void au0828_disable_source(struct media_entity *entity) dev->active_source = NULL; dev->active_sink = NULL; } - -end: - mutex_unlock(&mdev->graph_mutex); } #endif @@ -545,9 +540,11 @@ static int au0828_media_device_register(struct au0828_dev *dev, return ret; } /* set enable_source */ + mutex_lock(&dev->media_dev->graph_mutex); dev->media_dev->source_priv = (void *) dev; dev->media_dev->enable_source = au0828_enable_source; dev->media_dev->disable_source = au0828_disable_source; + mutex_unlock(&dev->media_dev->graph_mutex); #endif return 0; } |