diff options
| author | Logan Gunthorpe <logang@deltatee.com> | 2017-03-17 12:48:18 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-21 06:44:33 +0100 |
| commit | 857313e51006ff51524579bcd8808b70f9a80812 (patch) | |
| tree | 49844bbb9fdb8f66005c13505b4f98f0367b38a7 /drivers/media/media-devnode.c | |
| parent | 38923911dcc343f7f6624fc77a4ad63f2528fbcd (diff) | |
media: utilize new cdev_device_add helper function
Replace the open coded registration of the cdev and dev with the
new device_add_cdev() helper. The helper replaces a common pattern by
taking the proper reference against the parent device and adding both
the cdev and the device.
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/media/media-devnode.c')
| -rw-r--r-- | drivers/media/media-devnode.c | 20 |
1 files changed, 5 insertions, 15 deletions
diff --git a/drivers/media/media-devnode.c b/drivers/media/media-devnode.c index ae46753c90cb..423248f577b6 100644 --- a/drivers/media/media-devnode.c +++ b/drivers/media/media-devnode.c @@ -248,31 +248,22 @@ int __must_check media_devnode_register(struct media_device *mdev, dev_set_name(&devnode->dev, "media%d", devnode->minor); device_initialize(&devnode->dev); - /* Part 2: Initialize and register the character device */ + /* Part 2: Initialize the character device */ cdev_init(&devnode->cdev, &media_devnode_fops); devnode->cdev.owner = owner; - devnode->cdev.kobj.parent = &devnode->dev.kobj; - ret = cdev_add(&devnode->cdev, MKDEV(MAJOR(media_dev_t), devnode->minor), 1); + /* Part 3: Add the media and char device */ + ret = cdev_device_add(&devnode->cdev, &devnode->dev); if (ret < 0) { - pr_err("%s: cdev_add failed\n", __func__); + pr_err("%s: cdev_device_add failed\n", __func__); goto cdev_add_error; } - /* Part 3: Add the media device */ - ret = device_add(&devnode->dev); - if (ret < 0) { - pr_err("%s: device_add failed\n", __func__); - goto device_add_error; - } - /* Part 4: Activate this minor. The char device can now be used. */ set_bit(MEDIA_FLAG_REGISTERED, &devnode->flags); return 0; -device_add_error: - cdev_del(&devnode->cdev); cdev_add_error: mutex_lock(&media_devnode_lock); clear_bit(devnode->minor, media_devnode_nums); @@ -298,9 +289,8 @@ void media_devnode_unregister(struct media_devnode *devnode) { mutex_lock(&media_devnode_lock); /* Delete the cdev on this minor as well */ - cdev_del(&devnode->cdev); + cdev_device_del(&devnode->cdev, &devnode->dev); mutex_unlock(&media_devnode_lock); - device_del(&devnode->dev); devnode->media_dev = NULL; put_device(&devnode->dev); } |