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[PATCH] md: fail IO request to md that require a barrier.
[firefly-linux-kernel-4.4.55.git]
/
drivers
/
md
/
raid5.c
diff --git
a/drivers/md/raid5.c
b/drivers/md/raid5.c
index 43f231a467d5cb0137f15bd5568de80993a0bb08..ed859e08d600fbbc31ba8877fe440fd6167201cd 100644
(file)
--- a/
drivers/md/raid5.c
+++ b/
drivers/md/raid5.c
@@
-1411,6
+1411,11
@@
static int make_request (request_queue_t *q, struct bio * bi)
sector_t logical_sector, last_sector;
struct stripe_head *sh;
+ if (unlikely(bio_barrier(bi))) {
+ bio_endio(bi, bi->bi_size, -EOPNOTSUPP);
+ return 0;
+ }
+
md_write_start(mddev, bi);
if (bio_data_dir(bi)==WRITE) {