From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 40177C10F14 for ; Thu, 3 Oct 2019 17:17:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 13D1F20830 for ; Thu, 3 Oct 2019 17:17:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570123027; bh=QvtTFry1qIsP6+TuBN+Z8h7wwAlSQ6vclB0+CEJJ6wE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=2T3psPyNsbIHGUpcsdLhZGjOYRI81P7auDhz/fwyghVLf0GVwRGv3wD8c1pMw9y7H f7fI9jhpONMYnw7vo86HiBIl/8OA3ZmDY6R0OAk0HNdoN5rQCSQXe6M3Y5rnIklKp6 5rY34S+vSPou6YqdnadODC4wYbsJQQlmX7ilV5lo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388918AbfJCQXZ (ORCPT ); Thu, 3 Oct 2019 12:23:25 -0400 Received: from mail.kernel.org ([198.145.29.99]:52278 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390535AbfJCQXW (ORCPT ); Thu, 3 Oct 2019 12:23:22 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 3FF9C21783; Thu, 3 Oct 2019 16:23:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570119801; bh=QvtTFry1qIsP6+TuBN+Z8h7wwAlSQ6vclB0+CEJJ6wE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dsPaipRFTn2RSqv2MOLLYA97NhZuRwCYqUySEMhTbSBhLbVupR2uvy3gU/ho9TCIT jaSDxCNaMITFoTJogCgXgAMHqZ5AjjRu/QDNjAvPng+w+eSf0oznGEQaTfZexDRtCa 2XkFX9JcKEJWBXfE98P8H8qnjn32HvU2PKrpZJaE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "Ewan D. Milne" , Bart Van Assche , Hannes Reinecke , Christoph Hellwig , Mike Snitzer , dm-devel@redhat.com, Ming Lei , Jens Axboe , Sasha Levin Subject: [PATCH 4.19 161/211] scsi: implement .cleanup_rq callback Date: Thu, 3 Oct 2019 17:53:47 +0200 Message-Id: <20191003154524.771140869@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191003154447.010950442@linuxfoundation.org> References: <20191003154447.010950442@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Ming Lei [ Upstream commit b7e9e1fb7a9227be34ad4a5e778022c3164494cf ] Implement .cleanup_rq() callback for freeing driver private part of the request. Then we can avoid to leak this part if the request isn't completed by SCSI, and freed by blk-mq or upper layer(such as dm-rq) finally. Cc: Ewan D. Milne Cc: Bart Van Assche Cc: Hannes Reinecke Cc: Christoph Hellwig Cc: Mike Snitzer Cc: dm-devel@redhat.com Cc: Fixes: 396eaf21ee17 ("blk-mq: improve DM's blk-mq IO merging via blk_insert_cloned_request feedback") Signed-off-by: Ming Lei Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- drivers/scsi/scsi_lib.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 75b926e700766..abfcc2f924ce8 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -1252,6 +1252,18 @@ static void scsi_initialize_rq(struct request *rq) cmd->retries = 0; } +/* + * Only called when the request isn't completed by SCSI, and not freed by + * SCSI + */ +static void scsi_cleanup_rq(struct request *rq) +{ + if (rq->rq_flags & RQF_DONTPREP) { + scsi_mq_uninit_cmd(blk_mq_rq_to_pdu(rq)); + rq->rq_flags &= ~RQF_DONTPREP; + } +} + /* Add a command to the list used by the aacraid and dpt_i2o drivers */ void scsi_add_cmd_to_list(struct scsi_cmnd *cmd) { @@ -2339,6 +2351,7 @@ static const struct blk_mq_ops scsi_mq_ops = { .init_request = scsi_mq_init_request, .exit_request = scsi_mq_exit_request, .initialize_rq_fn = scsi_initialize_rq, + .cleanup_rq = scsi_cleanup_rq, .map_queues = scsi_map_queues, }; -- 2.20.1