+	rdev_for_each(rdev, mddev) {
+		if (rdev->raid_disk >= 0 && !test_bit(Faulty, &rdev->flags)) {
+			rv = blk_poll(bdev_get_queue(rdev->bdev), cookie, false);

This adds a > 80 char line.  But if you just use a continue to skip
the not allicable ones you even clean up the code while avoiding that.