md/raid10: end bio when the device faulty

Just like raid1, we do not queue write error bio to retry write
and acknowlege badblocks, when the device is faulty.
Signed-off-by: Yufen Yu <yuyufen@huawei.com>
Signed-off-by: Song Liu <songliubraving@fb.com>

drivers/md/raid10.c

@@ -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
+			}
+
+			/*
+			 * 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
-				set_bit(R10BIO_WriteError, &r10_bio->state);
 		}
 	} else {
 		/*