block: use blk_free_flush_queue() to free hctx->fq in blk_mq_init_hctx

shhuiw · axboe · commit b9a1ff504b94 · 2019-04-02T08:20:06.000-06:00
kfree() can leak the hctx-&gt;fq-&gt;flush_rq field.

Reviewed-by: Ming Lei &lt;ming.lei@redhat.com&gt;
Signed-off-by: Shenghui Wang &lt;shhuiw@foxmail.com&gt;
Signed-off-by: Jens Axboe &lt;axboe@kernel.dk&gt;
diff --git a/block/blk-mq.c b/block/blk-mq.c
@@ -2332,7 +2332,7 @@ static int blk_mq_init_hctx(struct request_queue *q,
 	return 0;
 
  free_fq:
-	kfree(hctx->fq);
+	blk_free_flush_queue(hctx->fq);
  exit_hctx:
 	if (set->ops->exit_hctx)
 		set->ops->exit_hctx(hctx, hctx_idx);
