Allow freeze_bdev() to return an error.
Signed-Off-By: Alasdair G Kergon <[email protected]>
From: Christoph Hellwig <[email protected]>
--- diff/drivers/md/dm.c 2005-04-21 16:07:21.000000000 +0100
+++ source/drivers/md/dm.c 2005-04-21 16:08:10.000000000 +0100
@@ -991,22 +991,38 @@
*/
static int __lock_fs(struct mapped_device *md)
{
+ int error = -ENOMEM;
+
if (test_and_set_bit(DMF_FS_LOCKED, &md->flags))
return 0;
md->frozen_bdev = bdget_disk(md->disk, 0);
if (!md->frozen_bdev) {
DMWARN("bdget failed in __lock_fs");
- return -ENOMEM;
+ goto out;
}
WARN_ON(md->frozen_sb);
+
md->frozen_sb = freeze_bdev(md->frozen_bdev);
+ if (IS_ERR(md->frozen_sb)) {
+ error = PTR_ERR(md->frozen_sb);
+ goto out_bdput;
+ }
+
/* don't bdput right now, we don't want the bdev
* to go away while it is locked. We'll bdput
* in __unlock_fs
*/
return 0;
+
+out_bdput:
+ bdput(md->frozen_bdev);
+ md->frozen_sb = NULL;
+ md->frozen_bdev = NULL;
+out:
+ clear_bit(DMF_FS_LOCKED, &md->flags);
+ return error;
}
static void __unlock_fs(struct mapped_device *md)
-
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