Merge tag 'md-fixes-20231003' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md into block-6.6

Pull MD fix from Song.

* tag 'md-fixes-20231003' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md:
  md/raid5: release batch_last before waiting for another stripe_head

Author: axboe

drivers/md/raid5.c

@@ -854,6 +854,13 @@ struct stripe_head *raid5_get_active_stripe(struct r5conf *conf,
 
 		set_bit(R5_INACTIVE_BLOCKED, &conf->cache_state);
 		r5l_wake_reclaim(conf->log, 0);
+
+		/* release batch_last before wait to avoid risk of deadlock */
+		if (ctx && ctx->batch_last) {
+			raid5_release_stripe(ctx->batch_last);
+			ctx->batch_last = NULL;
+		}
+
 		wait_event_lock_irq(conf->wait_for_stripe,
 				    is_inactive_blocked(conf, hash),
 				    *(conf->hash_locks + hash));