1 files changed, 5 insertions, 0 deletions

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index bc423f7eddce..4e9ebe1f1827 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -383,6 +383,11 @@ static int btrfs_check_super_csum(char *raw_disk_sb)
 
                 if (memcmp(raw_disk_sb, result, csum_size))
                         ret = 1;
+
+                if (ret && btrfs_super_generation(disk_sb) < 10) {
+                        printk(KERN_WARNING "btrfs: super block crcs don't match, older mkfs detected\n");
+                        ret = 0;
+                }
         }
 
         if (csum_type >= ARRAY_SIZE(btrfs_csum_sizes)) {