From 0d3ab8410dcb60aef2104231ba817037b3ba73bd Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Fri, 4 Sep 2015 15:33:46 -0300 Subject: [PATCH] [media] dvb core: must check dvb_create_media_graph() If media controller is enabled and mdev is filled, it should ensure that the media graph will be properly initialized. Enforce that. Acked-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/common/siano/smsdvb-main.c | 6 +++++- drivers/media/dvb-core/dvbdev.h | 2 +- drivers/media/usb/au0828/au0828-dvb.c | 8 +++++--- drivers/media/usb/cx231xx/cx231xx-dvb.c | 6 +++++- drivers/media/usb/dvb-usb-v2/dvb_usb_core.c | 4 +++- drivers/media/usb/dvb-usb/dvb-usb-dvb.c | 6 ++++-- 6 files changed, 23 insertions(+), 9 deletions(-) diff --git a/drivers/media/common/siano/smsdvb-main.c b/drivers/media/common/siano/smsdvb-main.c index f4305ae800f4..ab345490a43a 100644 --- a/drivers/media/common/siano/smsdvb-main.c +++ b/drivers/media/common/siano/smsdvb-main.c @@ -1183,7 +1183,11 @@ static int smsdvb_hotplug(struct smscore_device_t *coredev, if (smsdvb_debugfs_create(client) < 0) pr_info("failed to create debugfs node\n"); - dvb_create_media_graph(&client->adapter); + rc = dvb_create_media_graph(&client->adapter); + if (rc < 0) { + pr_err("dvb_create_media_graph failed %d\n", rc); + goto client_error; + } pr_info("DVB interface registered.\n"); return 0; diff --git a/drivers/media/dvb-core/dvbdev.h b/drivers/media/dvb-core/dvbdev.h index 3840dd62bfee..de85ba0f570a 100644 --- a/drivers/media/dvb-core/dvbdev.h +++ b/drivers/media/dvb-core/dvbdev.h @@ -206,7 +206,7 @@ int dvb_register_device(struct dvb_adapter *adap, void dvb_unregister_device(struct dvb_device *dvbdev); #ifdef CONFIG_MEDIA_CONTROLLER_DVB -int dvb_create_media_graph(struct dvb_adapter *adap); +__must_check int dvb_create_media_graph(struct dvb_adapter *adap); static inline void dvb_register_media_controller(struct dvb_adapter *adap, struct media_device *mdev) { diff --git a/drivers/media/usb/au0828/au0828-dvb.c b/drivers/media/usb/au0828/au0828-dvb.c index c01772c4f9f0..cd542b49a6c2 100644 --- a/drivers/media/usb/au0828/au0828-dvb.c +++ b/drivers/media/usb/au0828/au0828-dvb.c @@ -486,12 +486,14 @@ static int dvb_register(struct au0828_dev *dev) dvb->start_count = 0; dvb->stop_count = 0; -#ifdef CONFIG_MEDIA_CONTROLLER_DVB - dvb_create_media_graph(&dvb->adapter); -#endif + result = dvb_create_media_graph(&dvb->adapter); + if (result < 0) + goto fail_create_graph; return 0; +fail_create_graph: + dvb_net_release(&dvb->net); fail_fe_conn: dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem); fail_fe_mem: diff --git a/drivers/media/usb/cx231xx/cx231xx-dvb.c b/drivers/media/usb/cx231xx/cx231xx-dvb.c index e3594b9fab4a..b7552d20ebdb 100644 --- a/drivers/media/usb/cx231xx/cx231xx-dvb.c +++ b/drivers/media/usb/cx231xx/cx231xx-dvb.c @@ -551,10 +551,14 @@ static int register_dvb(struct cx231xx_dvb *dvb, /* register network adapter */ dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx); - dvb_create_media_graph(&dvb->adapter); + result = dvb_create_media_graph(&dvb->adapter); + if (result < 0) + goto fail_create_graph; return 0; +fail_create_graph: + dvb_net_release(&dvb->net); fail_fe_conn: dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem); fail_fe_mem: diff --git a/drivers/media/usb/dvb-usb-v2/dvb_usb_core.c b/drivers/media/usb/dvb-usb-v2/dvb_usb_core.c index f5df9eaba04f..6d3f61f6dc77 100644 --- a/drivers/media/usb/dvb-usb-v2/dvb_usb_core.c +++ b/drivers/media/usb/dvb-usb-v2/dvb_usb_core.c @@ -698,7 +698,9 @@ static int dvb_usbv2_adapter_frontend_init(struct dvb_usb_adapter *adap) } } - dvb_create_media_graph(&adap->dvb_adap); + ret = dvb_create_media_graph(&adap->dvb_adap); + if (ret < 0) + goto err_dvb_unregister_frontend; return 0; diff --git a/drivers/media/usb/dvb-usb/dvb-usb-dvb.c b/drivers/media/usb/dvb-usb/dvb-usb-dvb.c index 8a260c854653..b51dbdf03f42 100644 --- a/drivers/media/usb/dvb-usb/dvb-usb-dvb.c +++ b/drivers/media/usb/dvb-usb/dvb-usb-dvb.c @@ -318,10 +318,12 @@ int dvb_usb_adapter_frontend_init(struct dvb_usb_adapter *adap) adap->num_frontends_initialized++; } + if (ret) + return ret; - dvb_create_media_graph(&adap->dvb_adap); + ret = dvb_create_media_graph(&adap->dvb_adap); - return 0; + return ret; } int dvb_usb_adapter_frontend_exit(struct dvb_usb_adapter *adap) -- 2.20.1