diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/dvb-core/dvb_frontend.c | 24 | ||||
| -rw-r--r-- | drivers/media/usb/au0828/au0828-core.c | 21 | ||||
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-mc.c | 26 |
3 files changed, 45 insertions, 26 deletions
diff --git a/drivers/media/dvb-core/dvb_frontend.c b/drivers/media/dvb-core/dvb_frontend.c index 13dca47..85ae366 100644 --- a/drivers/media/dvb-core/dvb_frontend.c +++ b/drivers/media/dvb-core/dvb_frontend.c @@ -2533,9 +2533,13 @@ static int dvb_frontend_open(struct inode *inode, struct file *file) fepriv->voltage = -1; #ifdef CONFIG_MEDIA_CONTROLLER_DVB - if (fe->dvb->mdev && fe->dvb->mdev->enable_source) { - ret = fe->dvb->mdev->enable_source(dvbdev->entity, + if (fe->dvb->mdev) { + mutex_lock(&fe->dvb->mdev->graph_mutex); + if (fe->dvb->mdev->enable_source) + ret = fe->dvb->mdev->enable_source( + dvbdev->entity, &fepriv->pipe); + mutex_unlock(&fe->dvb->mdev->graph_mutex); if (ret) { dev_err(fe->dvb->device, "Tuner is busy. Error %d\n", ret); @@ -2559,8 +2563,12 @@ static int dvb_frontend_open(struct inode *inode, struct file *file) err3: #ifdef CONFIG_MEDIA_CONTROLLER_DVB - if (fe->dvb->mdev && fe->dvb->mdev->disable_source) - fe->dvb->mdev->disable_source(dvbdev->entity); + if (fe->dvb->mdev) { + mutex_lock(&fe->dvb->mdev->graph_mutex); + if (fe->dvb->mdev->disable_source) + fe->dvb->mdev->disable_source(dvbdev->entity); + mutex_unlock(&fe->dvb->mdev->graph_mutex); + } err2: #endif dvb_generic_release(inode, file); @@ -2592,8 +2600,12 @@ static int dvb_frontend_release(struct inode *inode, struct file *file) if (dvbdev->users == -1) { wake_up(&fepriv->wait_queue); #ifdef CONFIG_MEDIA_CONTROLLER_DVB - if (fe->dvb->mdev && fe->dvb->mdev->disable_source) - fe->dvb->mdev->disable_source(dvbdev->entity); + if (fe->dvb->mdev) { + mutex_lock(&fe->dvb->mdev->graph_mutex); + if (fe->dvb->mdev->disable_source) + fe->dvb->mdev->disable_source(dvbdev->entity); + mutex_unlock(&fe->dvb->mdev->graph_mutex); + } #endif if (fe->exit != DVB_FE_NO_EXIT) wake_up(&dvbdev->wait_queue); diff --git a/drivers/media/usb/au0828/au0828-core.c b/drivers/media/usb/au0828/au0828-core.c index 8c04940..739df61 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; } diff --git a/drivers/media/v4l2-core/v4l2-mc.c b/drivers/media/v4l2-core/v4l2-mc.c index fcf614a..303980b 100644 --- a/drivers/media/v4l2-core/v4l2-mc.c +++ b/drivers/media/v4l2-core/v4l2-mc.c @@ -198,14 +198,20 @@ EXPORT_SYMBOL_GPL(v4l2_mc_create_media_graph); int v4l_enable_media_source(struct video_device *vdev) { struct media_device *mdev = vdev->entity.graph_obj.mdev; - int ret; + int ret = 0, err; - if (!mdev || !mdev->enable_source) + if (!mdev) return 0; - ret = mdev->enable_source(&vdev->entity, &vdev->pipe); - if (ret) - return -EBUSY; - return 0; + + mutex_lock(&mdev->graph_mutex); + if (!mdev->enable_source) + goto end; + err = mdev->enable_source(&vdev->entity, &vdev->pipe); + if (err) + ret = -EBUSY; +end: + mutex_unlock(&mdev->graph_mutex); + return ret; } EXPORT_SYMBOL_GPL(v4l_enable_media_source); @@ -213,8 +219,12 @@ void v4l_disable_media_source(struct video_device *vdev) { struct media_device *mdev = vdev->entity.graph_obj.mdev; - if (mdev && mdev->disable_source) - mdev->disable_source(&vdev->entity); + if (mdev) { + mutex_lock(&mdev->graph_mutex); + if (mdev->disable_source) + mdev->disable_source(&vdev->entity); + mutex_unlock(&mdev->graph_mutex); + } } EXPORT_SYMBOL_GPL(v4l_disable_media_source); |
