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-rw-r--r--drivers/md/linear.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/md/linear.c b/drivers/md/linear.c
index 8d740013d74..4991ba54336 100644
--- a/drivers/md/linear.c
+++ b/drivers/md/linear.c
@@ -238,6 +238,11 @@ static int linear_make_request (request_queue_t *q, struct bio *bio)
dev_info_t *tmp_dev;
sector_t block;
+ if (unlikely(bio_barrier(bio))) {
+ bio_endio(bio, bio->bi_size, -EOPNOTSUPP);
+ return 0;
+ }
+
if (bio_data_dir(bio)==WRITE) {
disk_stat_inc(mddev->gendisk, writes);
disk_stat_add(mddev->gendisk, write_sectors, bio_sectors(bio));