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media: Clear devnode->media_dev holding media_devnode_lock 

Fix media_devnode_unregister() to clear devnode->media_dev while holding
media_devnode_lock. media_devnode_register()'s cdev_add_error handling
does this correctly.

Signed-off-by: Shuah Khan <shuah@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Shuah Khan 2019-04-01 20:43:18 -04:00 committed by Mauro Carvalho Chehab
parent 898bc40bfc
commit 10cb050459
1 changed files with 2 additions and 1 deletions
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3
drivers/media/media-devnode.c
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@ -291,8 +291,9 @@ void media_devnode_unregister(struct media_devnode *devnode)
mutex_lock(&media_devnode_lock);
/* Delete the cdev on this minor as well */
cdev_device_del(&devnode->cdev, &devnode->dev);
mutex_unlock(&media_devnode_lock);
devnode->media_dev = NULL;
mutex_unlock(&media_devnode_lock);
put_device(&devnode->dev);
}