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-rw-r--r--drivers/md/raid5.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 34cb065f6d6..8c9395f2028 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -3865,7 +3865,13 @@ static int make_request(struct request_queue *q, struct bio * bi)
int cpu, remaining;
if (unlikely(bio_rw_flagged(bi, BIO_RW_BARRIER))) {
- bio_endio(bi, -EOPNOTSUPP);
+ /* Drain all pending writes. We only really need
+ * to ensure they have been submitted, but this is
+ * easier.
+ */
+ mddev->pers->quiesce(mddev, 1);
+ mddev->pers->quiesce(mddev, 0);
+ md_barrier_request(mddev, bi);
return 0;
}