1 files changed, 13 insertions, 1 deletions

diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c
index 4e90f231fbfb..3d90f1b37e08 100644
--- a/drivers/md/dm-raid1.c
+++ b/drivers/md/dm-raid1.c
@@ -402,9 +402,21 @@ static void rh_dec(struct region_hash *rh, region_t region)
 
         spin_lock_irqsave(&rh->region_lock, flags);
         if (atomic_dec_and_test(&reg->pending)) {
+                /*
+                 * There is no pending I/O for this region.
+                 * We can move the region to corresponding list for next action.
+                 * At this point, the region is not yet connected to any list.
+                 *
+                 * If the state is RH_NOSYNC, the region should be kept off
+                 * from clean list.
+                 * The hash entry for RH_NOSYNC will remain in memory
+                 * until the region is recovered or the map is reloaded.
+                 */
+
+                /* do nothing for RH_NOSYNC */
                 if (reg->state == RH_RECOVERING) {
                         list_add_tail(&reg->list, &rh->quiesced_regions);
-                } else {
+                } else if (reg->state == RH_DIRTY) {
                         reg->state = RH_CLEAN;
                         list_add(&reg->list, &rh->clean_regions);
                 }