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authorMauro Carvalho Chehab <mchehab@osg.samsung.com>2015-12-28 09:55:49 -0200
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2016-01-11 12:19:15 -0200
commit9f80679511b0544d1ed8c9bc2d80030183e9f1ed (patch)
tree0aa38dd9818f88e48b4673c9862dfa1bd6e31084 /drivers/media
parent9832e155f1ed3030fdfaa19e72c06472dc2ecb1d (diff)
[media] usb: check media device errors
There are now two new warnings: drivers/media/usb/dvb-usb-v2/dvb_usb_core.c: In function 'dvb_usbv2_media_device_register': drivers/media/usb/dvb-usb-v2/dvb_usb_core.c:433:2: warning: ignoring return value of '__media_device_register', declared with attribute warn_unused_result [-Wunused-result] media_device_register(adap->dvb_adap.mdev); ^ drivers/media/usb/dvb-usb/dvb-usb-dvb.c: In function 'dvb_usb_media_device_register': drivers/media/usb/dvb-usb/dvb-usb-dvb.c:128:2: warning: ignoring return value of '__media_device_register', declared with attribute warn_unused_result [-Wunused-result] media_device_register(adap->dvb_adap.mdev); ^ Those are because the drivers are not properly checking if the media device init and register were succeeded. Fix it. Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/usb/au0828/au0828-core.c16
-rw-r--r--drivers/media/usb/cx231xx/cx231xx-cards.c13
-rw-r--r--drivers/media/usb/dvb-usb-v2/dvb_usb_core.c23
-rw-r--r--drivers/media/usb/dvb-usb/dvb-usb-dvb.c22
4 files changed, 54 insertions, 20 deletions
diff --git a/drivers/media/usb/au0828/au0828-core.c b/drivers/media/usb/au0828/au0828-core.c
index fbdaeb206565..9e29e70a78d7 100644
--- a/drivers/media/usb/au0828/au0828-core.c
+++ b/drivers/media/usb/au0828/au0828-core.c
@@ -217,15 +217,15 @@ static void au0828_usb_disconnect(struct usb_interface *interface)
au0828_usb_release(dev);
}
-static void au0828_media_device_init(struct au0828_dev *dev,
- struct usb_device *udev)
+static int au0828_media_device_init(struct au0828_dev *dev,
+ struct usb_device *udev)
{
#ifdef CONFIG_MEDIA_CONTROLLER
struct media_device *mdev;
mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
if (!mdev)
- return;
+ return -ENOMEM;
mdev->dev = &udev->dev;
@@ -243,6 +243,7 @@ static void au0828_media_device_init(struct au0828_dev *dev,
dev->media_dev = mdev;
#endif
+ return 0;
}
@@ -368,7 +369,14 @@ static int au0828_usb_probe(struct usb_interface *interface,
dev->board = au0828_boards[dev->boardnr];
/* Initialize the media controller */
- au0828_media_device_init(dev, usbdev);
+ retval = au0828_media_device_init(dev, usbdev);
+ if (retval) {
+ pr_err("%s() au0828_media_device_init failed\n",
+ __func__);
+ mutex_unlock(&dev->lock);
+ kfree(dev);
+ return retval;
+ }
#ifdef CONFIG_VIDEO_AU0828_V4L2
dev->v4l2_dev.release = au0828_usb_v4l2_release;
diff --git a/drivers/media/usb/cx231xx/cx231xx-cards.c b/drivers/media/usb/cx231xx/cx231xx-cards.c
index de0026b5265c..620b83d03f75 100644
--- a/drivers/media/usb/cx231xx/cx231xx-cards.c
+++ b/drivers/media/usb/cx231xx/cx231xx-cards.c
@@ -1206,7 +1206,7 @@ void cx231xx_release_resources(struct cx231xx *dev)
clear_bit(dev->devno, &cx231xx_devused);
}
-static void cx231xx_media_device_init(struct cx231xx *dev,
+static int cx231xx_media_device_init(struct cx231xx *dev,
struct usb_device *udev)
{
#ifdef CONFIG_MEDIA_CONTROLLER
@@ -1214,7 +1214,7 @@ static void cx231xx_media_device_init(struct cx231xx *dev,
mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
if (!mdev)
- return;
+ return -ENOMEM;
mdev->dev = dev->dev;
strlcpy(mdev->model, dev->board.name, sizeof(mdev->model));
@@ -1228,6 +1228,7 @@ static void cx231xx_media_device_init(struct cx231xx *dev,
dev->media_dev = mdev;
#endif
+ return 0;
}
static int cx231xx_create_media_graph(struct cx231xx *dev)
@@ -1663,7 +1664,11 @@ static int cx231xx_usb_probe(struct usb_interface *interface,
usb_set_intfdata(interface, dev);
/* Initialize the media controller */
- cx231xx_media_device_init(dev, udev);
+ retval = cx231xx_media_device_init(dev, udev);
+ if (retval) {
+ dev_err(d, "cx231xx_media_device_init failed\n");
+ goto err_media_init;
+ }
/* Create v4l2 device */
#ifdef CONFIG_MEDIA_CONTROLLER
@@ -1758,6 +1763,8 @@ err_video_alt:
err_init:
v4l2_device_unregister(&dev->v4l2_dev);
err_v4l2:
+ cx231xx_unregister_media_device(dev);
+err_media_init:
usb_set_intfdata(interface, NULL);
err_if:
usb_put_dev(udev);
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 7f52bcbd8b0d..0fa2c45917b0 100644
--- a/drivers/media/usb/dvb-usb-v2/dvb_usb_core.c
+++ b/drivers/media/usb/dvb-usb-v2/dvb_usb_core.c
@@ -400,7 +400,7 @@ skip_feed_stop:
return ret;
}
-static void dvb_usbv2_media_device_init(struct dvb_usb_adapter *adap)
+static int dvb_usbv2_media_device_init(struct dvb_usb_adapter *adap)
{
#ifdef CONFIG_MEDIA_CONTROLLER_DVB
struct media_device *mdev;
@@ -409,7 +409,7 @@ static void dvb_usbv2_media_device_init(struct dvb_usb_adapter *adap)
mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
if (!mdev)
- return;
+ return -ENOMEM;
mdev->dev = &udev->dev;
strlcpy(mdev->model, d->name, sizeof(mdev->model));
@@ -425,12 +425,15 @@ static void dvb_usbv2_media_device_init(struct dvb_usb_adapter *adap)
dev_info(&d->udev->dev, "media controller created\n");
#endif
+ return 0;
}
-static void dvb_usbv2_media_device_register(struct dvb_usb_adapter *adap)
+static int dvb_usbv2_media_device_register(struct dvb_usb_adapter *adap)
{
#ifdef CONFIG_MEDIA_CONTROLLER_DVB
- media_device_register(adap->dvb_adap.mdev);
+ return media_device_register(adap->dvb_adap.mdev);
+#else
+ return 0;
#endif
}
@@ -466,7 +469,12 @@ static int dvb_usbv2_adapter_dvb_init(struct dvb_usb_adapter *adap)
adap->dvb_adap.priv = adap;
- dvb_usbv2_media_device_init(adap);
+ ret = dvb_usbv2_media_device_init(adap);
+ if (ret < 0) {
+ dev_dbg(&d->udev->dev, "%s: dvb_usbv2_media_device_init() failed=%d\n",
+ __func__, ret);
+ goto err_dvb_register_mc;
+ }
if (d->props->read_mac_address) {
ret = d->props->read_mac_address(adap,
@@ -517,6 +525,7 @@ err_dvb_dmxdev_init:
dvb_dmx_release(&adap->demux);
err_dvb_dmx_init:
dvb_usbv2_media_device_unregister(adap);
+err_dvb_register_mc:
dvb_unregister_adapter(&adap->dvb_adap);
err_dvb_register_adapter:
adap->dvb_adap.priv = NULL;
@@ -701,9 +710,9 @@ static int dvb_usbv2_adapter_frontend_init(struct dvb_usb_adapter *adap)
if (ret < 0)
goto err_dvb_unregister_frontend;
- dvb_usbv2_media_device_register(adap);
+ ret = dvb_usbv2_media_device_register(adap);
- return 0;
+ return ret;
err_dvb_unregister_frontend:
for (i = count_registered - 1; i >= 0; i--)
diff --git a/drivers/media/usb/dvb-usb/dvb-usb-dvb.c b/drivers/media/usb/dvb-usb/dvb-usb-dvb.c
index 6a4bb2d86175..241463ef631e 100644
--- a/drivers/media/usb/dvb-usb/dvb-usb-dvb.c
+++ b/drivers/media/usb/dvb-usb/dvb-usb-dvb.c
@@ -95,7 +95,7 @@ static int dvb_usb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
return dvb_usb_ctrl_feed(dvbdmxfeed, 0);
}
-static void dvb_usb_media_device_init(struct dvb_usb_adapter *adap)
+static int dvb_usb_media_device_init(struct dvb_usb_adapter *adap)
{
#ifdef CONFIG_MEDIA_CONTROLLER_DVB
struct media_device *mdev;
@@ -104,7 +104,7 @@ static void dvb_usb_media_device_init(struct dvb_usb_adapter *adap)
mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
if (!mdev)
- return;
+ return -ENOMEM;
mdev->dev = &udev->dev;
strlcpy(mdev->model, d->desc->name, sizeof(mdev->model));
@@ -120,12 +120,15 @@ static void dvb_usb_media_device_init(struct dvb_usb_adapter *adap)
dev_info(&d->udev->dev, "media controller created\n");
#endif
+ return 0;
}
-static void dvb_usb_media_device_register(struct dvb_usb_adapter *adap)
+static int dvb_usb_media_device_register(struct dvb_usb_adapter *adap)
{
#ifdef CONFIG_MEDIA_CONTROLLER_DVB
- media_device_register(adap->dvb_adap.mdev);
+ return media_device_register(adap->dvb_adap.mdev);
+#else
+ return 0;
#endif
}
@@ -155,7 +158,11 @@ int dvb_usb_adapter_dvb_init(struct dvb_usb_adapter *adap, short *adapter_nums)
}
adap->dvb_adap.priv = adap;
- dvb_usb_media_device_init(adap);
+ ret = dvb_usb_media_device_init(adap);
+ if (ret < 0) {
+ deb_info("dvb_usb_media_device_init failed: error %d", ret);
+ goto err_mc;
+ }
if (adap->dev->props.read_mac_address) {
if (adap->dev->props.read_mac_address(adap->dev, adap->dvb_adap.proposed_mac) == 0)
@@ -205,6 +212,7 @@ err_dmx_dev:
dvb_dmx_release(&adap->demux);
err_dmx:
dvb_usb_media_device_unregister(adap);
+err_mc:
dvb_unregister_adapter(&adap->dvb_adap);
err:
return ret;
@@ -323,8 +331,10 @@ int dvb_usb_adapter_frontend_init(struct dvb_usb_adapter *adap)
return ret;
ret = dvb_create_media_graph(&adap->dvb_adap);
+ if (ret)
+ return ret;
- dvb_usb_media_device_register(adap);
+ ret = dvb_usb_media_device_register(adap);
return ret;
}