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=-13.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 51E0AC433E0 for ; Thu, 30 Jul 2020 08:20:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 30707204EA for ; Thu, 30 Jul 2020 08:20:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730381AbgG3IUa (ORCPT ); Thu, 30 Jul 2020 04:20:30 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:42752 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730010AbgG3IU0 (ORCPT ); Thu, 30 Jul 2020 04:20:26 -0400 Received: from 1.general.cking.uk.vpn ([10.172.193.212] helo=localhost) by youngberry.canonical.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1k13nb-0003Fu-6q; Thu, 30 Jul 2020 08:20:23 +0000 From: Colin King To: Oded Gabbay , Arnd Bergmann , Greg Kroah-Hartman , Tomer Tayar , Omer Shpigelman , Ofir Bitton Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH][next] habanalabs: fix incorrect check on failed workqueue create Date: Thu, 30 Jul 2020 09:20:22 +0100 Message-Id: <20200730082022.5557-1-colin.king@canonical.com> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Colin Ian King The null check on a failed workqueue create is currently null checking hdev->cq_wq rather than the pointer hdev->cq_wq[i] and so the test will never be true on a failed workqueue create. Fix this by checking hdev->cq_wq[i]. Addresses-Coverity: ("Dereference before null check") Fixes: 5574cb2194b1 ("habanalabs: Assign each CQ with its own work queue") Signed-off-by: Colin Ian King --- drivers/misc/habanalabs/common/device.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/misc/habanalabs/common/device.c b/drivers/misc/habanalabs/common/device.c index be16b75bdfdb..35214a186913 100644 --- a/drivers/misc/habanalabs/common/device.c +++ b/drivers/misc/habanalabs/common/device.c @@ -288,7 +288,7 @@ static int device_early_init(struct hl_device *hdev) for (i = 0 ; i < hdev->asic_prop.completion_queues_count ; i++) { snprintf(workq_name, 32, "hl-free-jobs-%u", i); hdev->cq_wq[i] = create_singlethread_workqueue(workq_name); - if (hdev->cq_wq == NULL) { + if (hdev->cq_wq[i] == NULL) { dev_err(hdev->dev, "Failed to allocate CQ workqueue\n"); rc = -ENOMEM; goto free_cq_wq; -- 2.27.0