1 files changed, 7 insertions, 2 deletions

diff --git a/fs/btrfs/reada.c b/fs/btrfs/reada.c
index 30947f923620..09230cf3a244 100644
--- a/fs/btrfs/reada.c
+++ b/fs/btrfs/reada.c
@@ -428,8 +428,13 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root,
                         continue;
                 }
                 if (!dev->bdev) {
-                        /* cannot read ahead on missing device */
-                        continue;
+                        /*
+                         * cannot read ahead on missing device, but for RAID5/6,
+                         * REQ_GET_READ_MIRRORS return 1. So don't skip missing
+                         * device for such case.
+                         */
+                        if (nzones > 1)
+                                continue;
                 }
                 if (dev_replace_is_ongoing &&
                     dev == fs_info->dev_replace.tgtdev) {