[PATCH 1/2] btrfs: refactor btrfs_free_stale_device() to get device list delete

[Anand Jain <anand.jain@oracle.com>]

We need to delete a device from the dev_list, so refactor
btrfs_free_stale_device() for delete_device_from_list().

Signed-off-by: Anand Jain <anand.jain@oracle.com>
---
 fs/btrfs/volumes.c | 27 +++++++++++++++++----------
 1 file changed, 17 insertions(+), 10 deletions(-)

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 8bac1cf17048..8ead85dba6f5 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -546,6 +546,22 @@ static void pending_bios_fn(struct btrfs_work *work)
 	run_scheduled_bios(device);
 }
 
+void delete_device_from_list(struct btrfs_device *dev)
+{
+	struct btrfs_fs_devices *fs_devs;
+	fs_devs = dev->fs_devices;
+
+	if (fs_devs->num_devices == 1) {
+		btrfs_sysfs_remove_fsid(fs_devs);
+		list_del(&fs_devs->list);
+		free_fs_devices(fs_devs);
+	} else {
+		fs_devs->num_devices--;
+		list_del(&dev->dev_list);
+		rcu_string_free(dev->name);
+		kfree(dev);
+	}
+}
 
 void btrfs_free_stale_device(struct btrfs_device *cur_dev)
 {
@@ -586,16 +602,7 @@ void btrfs_free_stale_device(struct btrfs_device *cur_dev)
 
 		if (!del) {
 			/* delete the stale device */
-			if (fs_devs->num_devices == 1) {
-				btrfs_sysfs_remove_fsid(fs_devs);
-				list_del(&fs_devs->list);
-				free_fs_devices(fs_devs);
-			} else {
-				fs_devs->num_devices--;
-				list_del(&dev->dev_list);
-				rcu_string_free(dev->name);
-				kfree(dev);
-			}
+			delete_device_from_list(dev);
 			break;
 		}
 	}
-- 
2.13.1