1 files changed, 23 insertions, 16 deletions

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 41ecbb2347f2..9df8e3f1ccab 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -256,13 +256,13 @@ loop_lock:
 			wake_up(&fs_info->async_submit_wait);
 
 		BUG_ON(atomic_read(&cur->bi_cnt) == 0);
-		submit_bio(cur->bi_rw, cur);
-		num_run++;
-		batch_run++;
 
 		if (bio_rw_flagged(cur, BIO_RW_SYNCIO))
 			num_sync_run++;
 
+		submit_bio(cur->bi_rw, cur);
+		num_run++;
+		batch_run++;
 		if (need_resched()) {
 			if (num_sync_run) {
 				blk_run_backing_dev(bdi, NULL);
@@ -325,16 +325,6 @@ loop_lock:
 		num_sync_run = 0;
 		blk_run_backing_dev(bdi, NULL);
 	}
-
-	cond_resched();
-	if (again)
-		goto loop;
-
-	spin_lock(&device->io_lock);
-	if (device->pending_bios.head || device->pending_sync_bios.head)
-		goto loop_lock;
-	spin_unlock(&device->io_lock);
-
 	/*
 	 * IO has already been through a long path to get here.  Checksumming,
 	 * async helper threads, perhaps compression.  We've done a pretty
@@ -346,6 +336,16 @@ loop_lock:
 	 * cared about found its way down here.
 	 */
 	blk_run_backing_dev(bdi, NULL);
+
+	cond_resched();
+	if (again)
+		goto loop;
+
+	spin_lock(&device->io_lock);
+	if (device->pending_bios.head || device->pending_sync_bios.head)
+		goto loop_lock;
+	spin_unlock(&device->io_lock);
+
 done:
 	return 0;
 }
@@ -365,6 +365,7 @@ static noinline int device_list_add(const char *path,
 	struct btrfs_device *device;
 	struct btrfs_fs_devices *fs_devices;
 	u64 found_transid = btrfs_super_generation(disk_super);
+	char *name;
 
 	fs_devices = find_fsid(disk_super->fsid);
 	if (!fs_devices) {
@@ -411,6 +412,12 @@ static noinline int device_list_add(const char *path,
 
 		device->fs_devices = fs_devices;
 		fs_devices->num_devices++;
+	} else if (strcmp(device->name, path)) {
+		name = kstrdup(path, GFP_NOFS);
+		if (!name)
+			return -ENOMEM;
+		kfree(device->name);
+		device->name = name;
 	}
 
 	if (found_transid > fs_devices->latest_trans) {
@@ -592,7 +599,7 @@ static int __btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
 			goto error_close;
 
 		disk_super = (struct btrfs_super_block *)bh->b_data;
-		devid = le64_to_cpu(disk_super->dev_item.devid);
+		devid = btrfs_stack_device_id(&disk_super->dev_item);
 		if (devid != device->devid)
 			goto error_brelse;
 
@@ -694,7 +701,7 @@ int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder,
 		goto error_close;
 	}
 	disk_super = (struct btrfs_super_block *)bh->b_data;
-	devid = le64_to_cpu(disk_super->dev_item.devid);
+	devid = btrfs_stack_device_id(&disk_super->dev_item);
 	transid = btrfs_super_generation(disk_super);
 	if (disk_super->label[0])
 		printk(KERN_INFO "device label %s ", disk_super->label);
@@ -1187,7 +1194,7 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path)
 			goto error_close;
 		}
 		disk_super = (struct btrfs_super_block *)bh->b_data;
-		devid = le64_to_cpu(disk_super->dev_item.devid);
+		devid = btrfs_stack_device_id(&disk_super->dev_item);
 		dev_uuid = disk_super->dev_item.uuid;
 		device = btrfs_find_device(root, devid, dev_uuid,
 					   disk_super->fsid);