From patchwork Thu Nov 17 13:15:46 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiongfeng Wang X-Patchwork-Id: 13046860 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 5C578C433FE for ; Thu, 17 Nov 2022 12:58:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233502AbiKQM6D (ORCPT ); Thu, 17 Nov 2022 07:58:03 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52194 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239598AbiKQM5h (ORCPT ); Thu, 17 Nov 2022 07:57:37 -0500 Received: from szxga03-in.huawei.com (szxga03-in.huawei.com [45.249.212.189]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3A75362055 for ; Thu, 17 Nov 2022 04:57:35 -0800 (PST) Received: from dggpemm500020.china.huawei.com (unknown [172.30.72.53]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4NCfxq14GxzJnR2; Thu, 17 Nov 2022 20:54:23 +0800 (CST) Received: from dggpemm500002.china.huawei.com (7.185.36.229) by dggpemm500020.china.huawei.com (7.185.36.49) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Thu, 17 Nov 2022 20:57:32 +0800 Received: from localhost.localdomain.localdomain (10.175.113.25) by dggpemm500002.china.huawei.com (7.185.36.229) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Thu, 17 Nov 2022 20:57:32 +0800 From: Xiongfeng Wang To: , , , , , , CC: , , Subject: [PATCH] RDMA/hfi: Decrease PCI device reference count in error path Date: Thu, 17 Nov 2022 21:15:46 +0800 Message-ID: <20221117131546.113280-1-wangxiongfeng2@huawei.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-Originating-IP: [10.175.113.25] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To dggpemm500002.china.huawei.com (7.185.36.229) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org pci_get_device() will increase the reference count for the returned pci_dev, and also decrease the reference count for the input parameter *from* if it is not NULL. If we break out the loop in node_affinity_init() with 'dev' not NULL, we need to call pci_dev_put() to decrease the reference count. Add missing pci_dev_put() in error path. Fixes: c513de490f80 ("IB/hfi1: Invalid NUMA node information can cause a divide by zero") Signed-off-by: Xiongfeng Wang --- drivers/infiniband/hw/hfi1/affinity.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/infiniband/hw/hfi1/affinity.c b/drivers/infiniband/hw/hfi1/affinity.c index 877f8e84a672..77ee77d4000f 100644 --- a/drivers/infiniband/hw/hfi1/affinity.c +++ b/drivers/infiniband/hw/hfi1/affinity.c @@ -177,6 +177,8 @@ int node_affinity_init(void) for (node = 0; node < node_affinity.num_possible_nodes; node++) hfi1_per_node_cntr[node] = 1; + pci_dev_put(dev); + return 0; }