From patchwork Wed Jan 4 09:08:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiasheng Jiang X-Patchwork-Id: 1721284 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=2620:137:e000::1:20; helo=out1.vger.email; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Received: from out1.vger.email (out1.vger.email [IPv6:2620:137:e000::1:20]) by legolas.ozlabs.org (Postfix) with ESMTP id 4Nn3fx5kzCz23fc for ; Wed, 4 Jan 2023 20:08:25 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233967AbjADJIY (ORCPT ); Wed, 4 Jan 2023 04:08:24 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33852 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233121AbjADJIX (ORCPT ); Wed, 4 Jan 2023 04:08:23 -0500 Received: from cstnet.cn (smtp23.cstnet.cn [159.226.251.23]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id EFC17B1B; Wed, 4 Jan 2023 01:08:21 -0800 (PST) Received: from localhost.localdomain (unknown [124.16.138.125]) by APP-03 (Coremail) with SMTP id rQCowABnSab5QbVj8mZsCg--.32128S2; Wed, 04 Jan 2023 17:08:09 +0800 (CST) From: Jiasheng Jiang To: jdmason@kudzu.us, dave.jiang@intel.com, allenbh@gmail.com, lpieralisi@kernel.org, kw@linux.com, mani@kernel.org, kishon@kernel.org, bhelgaas@google.com Cc: ntb@lists.linux.dev, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Jiasheng Jiang Subject: [PATCH] PCI: endpoint: pci-epf-vntb: Add missing check for alloc_workqueue Date: Wed, 4 Jan 2023 17:08:08 +0800 Message-Id: <20230104090808.46085-1-jiasheng@iscas.ac.cn> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-CM-TRANSID: rQCowABnSab5QbVj8mZsCg--.32128S2 X-Coremail-Antispam: 1UD129KBjvdXoW7XrW5Ar1fGF13GryfXrWkZwb_yoWfZFX_Wa 97ZrsrWrZ8Gr18uryYkw4xZFyvkwnYqFn3ZFWrKFyakFyfC3yY93yDJryDGr1xWF15tryD u34qvr90yr12gjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbVxFF20E14v26r4j6ryUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_tr0E3s1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j 6F4UJwA2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oV Cq3wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0 I7IYx2IY67AKxVWUXVWUAwAv7VC2z280aVAFwI0_Gr0_Cr1lOx8S6xCaFVCjc4AY6r1j6r 4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x02628v n2kIc2xKxwCY02Avz4vE14v_GFWl42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr 0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY 17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcV C0I7IYx2IY6xkF7I0E14v26r4j6F4UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY 6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa 73UjIFyTuYvjfU09NVDUUUU X-Originating-IP: [124.16.138.125] X-CM-SenderInfo: pmld2xxhqjqxpvfd2hldfou0/ X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_MED, SPF_HELO_PASS,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Add check for the return value of alloc_workqueue since it may return NULL pointer. Fixes: e35f56bb0330 ("PCI: endpoint: Support NTB transfer between RC and EP") Signed-off-by: Jiasheng Jiang Reviewed-by: Manivannan Sadhasivam --- drivers/pci/endpoint/functions/pci-epf-vntb.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/pci/endpoint/functions/pci-epf-vntb.c b/drivers/pci/endpoint/functions/pci-epf-vntb.c index 04698e7995a5..05c99185ba65 100644 --- a/drivers/pci/endpoint/functions/pci-epf-vntb.c +++ b/drivers/pci/endpoint/functions/pci-epf-vntb.c @@ -1441,6 +1441,9 @@ static int __init epf_ntb_init(void) kpcintb_workqueue = alloc_workqueue("kpcintb", WQ_MEM_RECLAIM | WQ_HIGHPRI, 0); + if (!kpcintb_workqueue) + return -ENOMEM; + ret = pci_epf_register_driver(&epf_ntb_driver); if (ret) { destroy_workqueue(kpcintb_workqueue);