From patchwork Fri Sep 29 15:10:12 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Wei Hu (Xavier)" X-Patchwork-Id: 9978181 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 806CE60329 for ; Fri, 29 Sep 2017 14:42:24 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 74C2B29871 for ; Fri, 29 Sep 2017 14:42:24 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 69A7129876; Fri, 29 Sep 2017 14:42:24 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D5A0E29871 for ; Fri, 29 Sep 2017 14:42:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752177AbdI2OmR (ORCPT ); Fri, 29 Sep 2017 10:42:17 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:7476 "EHLO szxga04-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752144AbdI2OmQ (ORCPT ); Fri, 29 Sep 2017 10:42:16 -0400 Received: from 172.30.72.59 (EHLO DGGEMS410-HUB.china.huawei.com) ([172.30.72.59]) by dggrg04-dlp.huawei.com (MOS 4.4.6-GA FastPath queued) with ESMTP id DIE66161; Fri, 29 Sep 2017 22:42:13 +0800 (CST) Received: from linux-ioko.site (10.71.200.31) by DGGEMS410-HUB.china.huawei.com (10.3.19.210) with Microsoft SMTP Server id 14.3.301.0; Fri, 29 Sep 2017 22:42:04 +0800 From: "Wei Hu (Xavier)" To: CC: , , , , , , , , , , Subject: [PATCH V2 for-next 6/8] RDMA/hns: Add return statement when checking error in hns_roce_v1_mr_free_work_fn Date: Fri, 29 Sep 2017 23:10:12 +0800 Message-ID: <1506697814-98432-7-git-send-email-xavier.huwei@huawei.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1506697814-98432-1-git-send-email-xavier.huwei@huawei.com> References: <1506697814-98432-1-git-send-email-xavier.huwei@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.71.200.31] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020205.59CE5BC5.0194, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0, so=2014-11-16 11:51:01, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 28689d884a4a5d30690b8c77f5a5275c Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP After the loop in hns_roce_v1_mr_free_work_fn function, it is possible that the local variable named hr_qp is NULL, the operation "hr_qp->qpn" will result in the exception. As a result, we add return statement when checking error. This patch fixes the smatch error as below: drivers/infiniband/hw/hns/hns_roce_hw_v1.c:1009 hns_roce_v1_mr_free_work_fn() error: we previously assumed 'hr_qp' could be null Signed-off-by: Wei Hu (Xavier) Signed-off-by: Lijun Ou Signed-off-by: Shaobo Xu --- drivers/infiniband/hw/hns/hns_roce_hw_v1.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c index d82b4de..15e0f2e 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c @@ -1004,6 +1004,11 @@ static void hns_roce_v1_mr_free_work_fn(struct work_struct *work) } } + if (!ne) { + dev_err(dev, "Reseved loop qp is absent!\n"); + goto free_work; + } + do { ret = hns_roce_v1_poll_cq(&mr_free_cq->ib_cq, ne, wc); if (ret < 0) {