1 files changed, 10 insertions, 1 deletions

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index a1a6c296ddcd..ef2415896b06 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -116,7 +116,16 @@ static void btrfs_handle_error(struct btrfs_fs_info *fs_info)
         if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) {
                 sb->s_flags |= MS_RDONLY;
                 printk(KERN_INFO "btrfs is forced readonly\n");
-                btrfs_scrub_cancel(fs_info);
+                /*
+                 * Note that a running device replace operation is not
+                 * canceled here although there is no way to update
+                 * the progress. It would add the risk of a deadlock,
+                 * therefore the canceling is ommited. The only penalty
+                 * is that some I/O remains active until the procedure
+                 * completes. The next time when the filesystem is
+                 * mounted writeable again, the device replace
+                 * operation continues.
+                 */
 //              WARN_ON(1);
         }
 }