Merge branch 'md-fixes' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md into block-5.16

Pull MD fix from Song, fixing a raid1 regression with missing bitmap
updates.

* 'md-fixes' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md:
  md/raid1: fix missing bitmap update w/o WriteMostly devices

Author: axboe

drivers/md/raid1.c

@@ -1496,12 +1496,13 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
 		if (!r1_bio->bios[i])
 			continue;
 
-		if (first_clone && test_bit(WriteMostly, &rdev->flags)) {
+		if (first_clone) {
 			/* do behind I/O ?
 			 * Not if there are too many, or cannot
 			 * allocate memory, or a reader on WriteMostly
 			 * is waiting for behind writes to flush */
 			if (bitmap &&
+			    test_bit(WriteMostly, &rdev->flags) &&
 			    (atomic_read(&bitmap->behind_writes)
 			     < mddev->bitmap_info.max_write_behind) &&
 			    !waitqueue_active(&bitmap->behind_wait)) {