From patchwork Sat Nov 6 17:54:59 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Saheed O. Bolarinwa" X-Patchwork-Id: 12606423 X-Patchwork-Delegate: bhelgaas@google.com 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2A7F0C433F5 for ; Sat, 6 Nov 2021 17:55:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 104106023D for ; Sat, 6 Nov 2021 17:55:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233578AbhKFR5v (ORCPT ); Sat, 6 Nov 2021 13:57:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49254 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232950AbhKFR5u (ORCPT ); Sat, 6 Nov 2021 13:57:50 -0400 Received: from mail-ed1-x535.google.com (mail-ed1-x535.google.com [IPv6:2a00:1450:4864:20::535]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DE5F5C061570; Sat, 6 Nov 2021 10:55:08 -0700 (PDT) Received: by mail-ed1-x535.google.com with SMTP id o8so44667318edc.3; Sat, 06 Nov 2021 10:55:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=M/ckoETcz+yDddWrcBDGrX7LHLDThJbVjbuAhn7hXgw=; b=SFtPHmKQmzg2xNySjUeW7uj9FY8djQRU2IHJpRV7StO1e9KqYwy82fMh0vANf8XyHC Smply+kcEW/e8/5pUKaXdPJ1C1E6iEsaPNN2K6MIrC06zZVSJ1DMj/ZumieiyAeiOZ8G dDQP/Pif9btC8RxWLFFe6JMdx/JgrJTPe83BBoq5FrC9w0Z2xe63FN/ZeeA8pO2VKTVY PEebt7T0WoWUKQuiOdZbAuGsBviXkBFrkRLxiNa7xdqsxnAYezadpohEL9hmRUs16Zkk AyhanJ41xMEr1y3c0CexvuKpvKnetnp+GJnOupIoDtNTa42Vb/Na5e89POfM0GD+8gaG +dNQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=M/ckoETcz+yDddWrcBDGrX7LHLDThJbVjbuAhn7hXgw=; b=f2+ftb6KeK2t3wgEhd6L+foFZXGTdLf+V501GhkeXB2q78hcUIyYV1u04DCbqb5nT6 XhtoyVqfhNLdMVB2YGaQiPhY52Gzgci0qxJtKxXc3W5+Dnda7dQ2n9ATljNaNUdB1+gJ rCXx3orsneCLxN14jwDtegWRVyVVDLfRG8p5kYmIeDceijzFm9yM6ZtuvF6rgBLYymHr ev6ZSOnPtsd6tKekyuAVO53DX1q4pbJKALrpETs6uXeGIgxFWn16zU4OI2I4COFKtgsc 95yhahR5wCDZIjhm42V3Amfy69Anojr2c5SpghpJM1d6tRMYPGpoPIfVivXB3kvOuj0n dxvg== X-Gm-Message-State: AOAM532M8Ixc+wxqVsxwgTL7qokicOPNYCld/aFqkufa707pGjmL88F6 WHVN+IVr1VFodJ+VCHnW06M= X-Google-Smtp-Source: ABdhPJy64kPU3OqrrSSQGHxhbjsgy2XMgPPRzMctH5uVasLD2sxUJIHcPnbnq+KRzoYE9o48nf3vTA== X-Received: by 2002:a05:6402:3488:: with SMTP id v8mr63961116edc.170.1636221307512; Sat, 06 Nov 2021 10:55:07 -0700 (PDT) Received: from localhost.localdomain ([2a02:ab88:109:9f0:f6a6:7fbe:807a:e1cc]) by smtp.googlemail.com with ESMTPSA id 25sm6542848edw.19.2021.11.06.10.55.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 06 Nov 2021 10:55:07 -0700 (PDT) From: "Saheed O. Bolarinwa" To: helgaas@kernel.org Cc: "Saheed O. Bolarinwa" , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH v3 1/5] PCI: Handle NULL value inside pci_upstream_bridge() Date: Sat, 6 Nov 2021 18:54:59 +0100 Message-Id: <20211106175503.27178-2-refactormyself@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20211106175503.27178-1-refactormyself@gmail.com> References: <20211106175503.27178-1-refactormyself@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Return NULL if a NULL pointer is passed into pci_upstream_bridge(). Signed-off-by: Saheed O. Bolarinwa --- include/linux/pci.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/include/linux/pci.h b/include/linux/pci.h index cd8aa6fce204..b087e0b9814e 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -695,6 +695,9 @@ static inline bool pci_is_bridge(struct pci_dev *dev) static inline struct pci_dev *pci_upstream_bridge(struct pci_dev *dev) { + if (!dev) + return NULL; + dev = pci_physfn(dev); if (pci_is_root_bus(dev->bus)) return NULL;