btrfs: handle errors in btrfs_sysfs_add_fs_devices
btrfs_sysfs_add_fs_devices() is called by btrfs_sysfs_add_mounted(). btrfs_sysfs_add_mounted() assumes that btrfs_sysfs_add_fs_devices() will either add sysfs entries for all the devices or none. So this patch keeps up to its caller expecatation and cleans up the created sysfs entries if it has to fail at some device in the list. Reviewed-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: Anand Jain <anand.jain@oracle.com> Signed-off-by: David Sterba <dsterba@suse.com>
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