Merge tag 'v3.10.72' into linux-linaro-lsklsk-v3.10-15.03

 This is the 3.10.72 stable release

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c
index 699b5be68d31..678556b8ee4d 100644
--- a/drivers/md/dm-raid1.c
+++ b/drivers/md/dm-raid1.c
@@ -604,6 +604,15 @@ static void write_callback(unsigned long error, void *context)
 		return;
 	}
 
+	/*
+	 * If the bio is discard, return an error, but do not
+	 * degrade the array.
+	 */
+	if (bio->bi_rw & REQ_DISCARD) {
+		bio_endio(bio, -EOPNOTSUPP);
+		return;
+	}
+
 	for (i = 0; i < ms->nr_mirrors; i++)
 		if (test_bit(i, &error))
 			fail_mirror(ms->mirror + i, DM_RAID1_WRITE_ERROR);