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btrfs: optimize check for stale device 

Optimize check for stale device to only be checked when there is device
added or changed. If there is no update to the device, there is no need
to call btrfs_free_stale_device().

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Anand Jain 2016-02-13 10:01:40 +08:00 committed by David Sterba
parent 6b526ed70c
commit 02feae3c55
1 changed files with 2 additions and 1 deletions
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3
fs/btrfs/volumes.c
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@ -699,7 +699,8 @@ static noinline int device_list_add(const char *path,
* if there is new btrfs on an already registered device,
* then remove the stale device entry.
*/
btrfs_free_stale_device(device);
if (ret > 0)
btrfs_free_stale_device(device);
*fs_devices_ret = fs_devices;