1 files changed, 20 insertions, 19 deletions

diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 8a1354a08a1a..ec136e44aef7 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -191,7 +191,7 @@ static void * r10buf_pool_alloc(gfp_t gfp_flags, void *data)
 
 out_free_pages:
 	while (--j >= 0)
-		resync_free_pages(&rps[j * 2]);
+		resync_free_pages(&rps[j]);
 
 	j = 0;
 out_free_bio:
@@ -465,19 +465,21 @@ static void raid10_end_write_request(struct bio *bio)
 			if (test_bit(FailFast, &rdev->flags) &&
 			    (bio->bi_opf & MD_FAILFAST)) {
 				md_error(rdev->mddev, rdev);
-				if (!test_bit(Faulty, &rdev->flags))
-					/* This is the only remaining device,
-					 * We need to retry the write without
-					 * FailFast
-					 */
-					set_bit(R10BIO_WriteError, &r10_bio->state);
-				else {
-					r10_bio->devs[slot].bio = NULL;
-					to_put = bio;
-					dec_rdev = 1;
-				}
-			} else
+			}
+
+			/*
+			 * When the device is faulty, it is not necessary to
+			 * handle write error.
+			 * For failfast, this is the only remaining device,
+			 * We need to retry the write without FailFast.
+			 */
+			if (!test_bit(Faulty, &rdev->flags))
 				set_bit(R10BIO_WriteError, &r10_bio->state);
+			else {
+				r10_bio->devs[slot].bio = NULL;
+				to_put = bio;
+				dec_rdev = 1;
+			}
 		}
 	} else {
 		/*
@@ -1523,10 +1525,9 @@ static bool raid10_make_request(struct mddev *mddev, struct bio *bio)
 	int chunk_sects = chunk_mask + 1;
 	int sectors = bio_sectors(bio);
 
-	if (unlikely(bio->bi_opf & REQ_PREFLUSH)) {
-		md_flush_request(mddev, bio);
+	if (unlikely(bio->bi_opf & REQ_PREFLUSH)
+	    && md_flush_request(mddev, bio))
 		return true;
-	}
 
 	if (!md_write_start(mddev, bio))
 		return false;
@@ -1638,12 +1639,12 @@ static void raid10_error(struct mddev *mddev, struct md_rdev *rdev)
 
 	/*
 	 * If it is not operational, then we have already marked it as dead
-	 * else if it is the last working disks, ignore the error, let the
-	 * next level up know.
+	 * else if it is the last working disks with "fail_last_dev == false",
+	 * ignore the error, let the next level up know.
 	 * else mark the drive as failed
 	 */
 	spin_lock_irqsave(&conf->device_lock, flags);
-	if (test_bit(In_sync, &rdev->flags)
+	if (test_bit(In_sync, &rdev->flags) && !mddev->fail_last_dev
 	    && !enough(conf, rdev->raid_disk)) {
 		/*
 		 * Don't fail the drive, just return an IO error.