md/RAID1: Add missing case for attempting to repair known bad blocks.

When doing resync or repair, attempt to correct bad blocks, according
to WriteErrorSeen policy

Signed-off-by: Alex Lyakas <alex.bolshoy@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index d2361b162de5..197f62681db5 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -2445,6 +2445,18 @@ static sector_t sync_request(struct mddev *mddev, sector_t sector_nr, int *skipp
                                 bio->bi_rw = READ;
                                 bio->bi_end_io = end_sync_read;
                                 read_targets++;
+                        } else if (!test_bit(WriteErrorSeen, &rdev->flags) &&
+                                test_bit(MD_RECOVERY_SYNC, &mddev->recovery) &&
+                                !test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) {
+                                /*
+                                 * The device is suitable for reading (InSync),
+                                 * but has bad block(s) here. Let's try to correct them,
+                                 * if we are doing resync or repair. Otherwise, leave
+                                 * this device alone for this sync request.
+                                 */
+                                bio->bi_rw = WRITE;
+                                bio->bi_end_io = end_sync_write;
+                                write_targets++;
                         }
                 }
                 if (bio->bi_end_io) {