From patchwork Tue Feb 22 14:14:40 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 546630 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2DA70C433F5 for ; Tue, 22 Feb 2022 14:15:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230300AbiBVOP2 (ORCPT ); Tue, 22 Feb 2022 09:15:28 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36222 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230396AbiBVOPZ (ORCPT ); Tue, 22 Feb 2022 09:15:25 -0500 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 72702160412; Tue, 22 Feb 2022 06:15:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=3obkjTecc+tBmDXw3y9QiE7nas6q/YaXMeQ/pRJ2RoA=; b=eB0uobuHJiWfSO6bM0iNGxQ93z wrvg4nDEpMMfmcIydF8pVuMR3o+OoposoBfj9A8XkEWVSyyQCYS/l9Gatp9YI1IFq0nIw6eySWPUs seMO06kHSN0clHh1U9ji0DWPEQUwyICdC3o1ArQIUbw9UIwQjWT8rTqENqFi7jUGn2vMkQmh5noCU BIzaWgme7VEduQn0QMQ2FqEhRa7EsgJx1Y3xWw45M8WToy2FhJodq/mo3lyyib7TUWFazc6VtNbqR q5dEI9UyjEv6qsqub9qbEOxYRe31X/bngkkbr1jtSqHiA1Gy0tq2/O8k5si/7HipK57YUGjb7w1f/ QfZ/Gocg==; Received: from [2001:4bb8:198:f8fc:c22a:ebfc:be8d:63c2] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1nMVwP-009qD8-JW; Tue, 22 Feb 2022 14:14:58 +0000 From: Christoph Hellwig To: Jens Axboe Cc: "Martin K. Petersen" , Ming Lei , linux-block@vger.kernel.org, linux-scsi@vger.kernel.org Subject: [PATCH 02/12] blk-mq: handle already freed tags gracefully in blk_mq_free_rqs Date: Tue, 22 Feb 2022 15:14:40 +0100 Message-Id: <20220222141450.591193-3-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220222141450.591193-1-hch@lst.de> References: <20220222141450.591193-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Ming Lei To simplify further changes allow for double calling blk_mq_free_rqs on a queue. Signed-off-by: Ming Lei [hch: split out from a larger patch] Signed-off-by: Christoph Hellwig --- block/blk-mq.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/block/blk-mq.c b/block/blk-mq.c index ee80853473d1e..63e2d3fd60946 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -3061,6 +3061,9 @@ void blk_mq_free_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags, struct blk_mq_tags *drv_tags; struct page *page; + if (list_empty(&tags->page_list)) + return; + if (blk_mq_is_shared_tags(set->flags)) drv_tags = set->shared_tags; else