From patchwork Wed Aug 11 15:36:17 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Boqun Feng X-Patchwork-Id: 12431489 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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 4DA70C432BE for ; Wed, 11 Aug 2021 15:36:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 252B660FD9 for ; Wed, 11 Aug 2021 15:36:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233300AbhHKPhG (ORCPT ); Wed, 11 Aug 2021 11:37:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45864 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233248AbhHKPhE (ORCPT ); Wed, 11 Aug 2021 11:37:04 -0400 Received: from mail-il1-x133.google.com (mail-il1-x133.google.com [IPv6:2607:f8b0:4864:20::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 845F7C0613D5; Wed, 11 Aug 2021 08:36:40 -0700 (PDT) Received: by mail-il1-x133.google.com with SMTP id c3so3315023ilh.3; Wed, 11 Aug 2021 08:36:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=m+WerKLNTuUcJjz5ppPIhMIuAZu9yrWomJykGHOMdQE=; b=Xw6bPBKjGySndzPoxC/HBXcfij6Ej8gsr8XCwc/zUlawabtn9idGbjPtC5CiRKkBTI IA8wyHhBi1Eb/DNR66nHkc+bGlSqJ1oMU4yomnzFoL0dLvsgp9EijGkpycy+ME8ywYAU 9miztcb3otIBCm1rnSjISWjbUkHjtO5Zh2zXHk64EhOOR4+ZoIniFCi6Vzp+VeQwPEFF 0swypePmtrL4wWMaRNBmi/e63ZXF5YQpxE0eYKmevPTTY0pWT9oCPylMLKRBiOT3TNq1 9Jbxxt1ehFQEq3YrJUL7/RrF9dIgres10UXUChxe2NvXIyryaSik9xOkU7x4vyd0R6Yz cr1g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=m+WerKLNTuUcJjz5ppPIhMIuAZu9yrWomJykGHOMdQE=; b=PJ6KQ1a8g1oDOyv6OHsFsUocjdzpWKt+2QUVpYBsgGOaAva71E+z67DdBzuhAEFp01 C2GKXz3Kxdw8Khh905spuORcWhQtMTaLZGjbLZ9ovu/tszK44gSbJm7VbtAGRwoYWk86 tSbci4C9Fh8wTZAUZj+rGP5ZntM/hy4+BPpc4ajVnjlffC3J18+ixXdqClLYL3zBJalv 0AAYf+9pqTUaIEALh+8/h8r8sleI+/DYVnSZl4baROLP85WZJ9Gugd8tbRXICTYq+ukE 4hwpAc9KNZ7qHth2lMPC4d9qMUTCo94jDf2fzCTZjgRvlqpwn2OkhJLt7v5fnpSN2OAd 3SOA== X-Gm-Message-State: AOAM531hMIF0XEONkVXJORK03mf59s6CKCxnM3knUhe5wj/Uj9aVvY5R 59Tijx9xErqmiONQ3Kxy1jA= X-Google-Smtp-Source: ABdhPJwG2Q43Tufl+2zOtEvKna7XTvih3Y7p27iDvAbAfAT9elYx46qIz2mqI+h/bG7cZprSEiAaxg== X-Received: by 2002:a05:6e02:13f0:: with SMTP id w16mr276304ilj.268.1628696200058; Wed, 11 Aug 2021 08:36:40 -0700 (PDT) Received: from auth2-smtp.messagingengine.com (auth2-smtp.messagingengine.com. [66.111.4.228]) by smtp.gmail.com with ESMTPSA id t15sm12914887iln.77.2021.08.11.08.36.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 Aug 2021 08:36:39 -0700 (PDT) Received: from compute5.internal (compute5.nyi.internal [10.202.2.45]) by mailauth.nyi.internal (Postfix) with ESMTP id BCAAA27C0054; Wed, 11 Aug 2021 11:36:38 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute5.internal (MEProxy); Wed, 11 Aug 2021 11:36:38 -0400 X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvtddrkedugdeklecutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenuc fjughrpefhvffufffkofgjfhgggfestdekredtredttdenucfhrhhomhepuehoqhhunhcu hfgvnhhguceosghoqhhunhdrfhgvnhhgsehgmhgrihhlrdgtohhmqeenucggtffrrghtth gvrhhnpeehvdevteefgfeiudettdefvedvvdelkeejueffffelgeeuhffhjeetkeeiueeu leenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhgrihhlfhhrohhmpegsoh hquhhnodhmvghsmhhtphgruhhthhhpvghrshhonhgrlhhithihqdeiledvgeehtdeigedq udejjeekheehhedvqdgsohhquhhnrdhfvghngheppehgmhgrihhlrdgtohhmsehfihigmh gvrdhnrghmvg X-ME-Proxy: Received: by mail.messagingengine.com (Postfix) with ESMTPA; Wed, 11 Aug 2021 11:36:37 -0400 (EDT) From: Boqun Feng To: Lorenzo Pieralisi Cc: Catalin Marinas , Will Deacon , Bjorn Helgaas , "Rafael J. Wysocki" , Len Brown , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Dexuan Cui , Rob Herring , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , Boqun Feng , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org, linux-hyperv@vger.kernel.org, Sunil Muthuswamy , Marc Zyngier , Arnd Bergmann Subject: [RFC 3/5] PCI: hv: Set NULL as the ACPI device for the PCI host bridge Date: Wed, 11 Aug 2021 23:36:17 +0800 Message-Id: <20210811153619.88922-4-boqun.feng@gmail.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210811153619.88922-1-boqun.feng@gmail.com> References: <20210811153619.88922-1-boqun.feng@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org A PCI host bridge of Hyper-V doesn't have the corresponding ACPI device, therefore a NULL pointer needs to be set as the ->private of pci_host_bridge since for platforms with ACPI ->private is used to store the ACPI device information for the host bridges. And since kzalloc() is used to allocate pci_host_bridge, as a result, what is needed is just setting the correct size of ->private, kzalloc() will zero the field as if set a NULL pointer to it. Signed-off-by: Boqun Feng --- drivers/pci/controller/pci-hyperv.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/pci-hyperv.c index 62dbe98d1fe1..fd3792b5edcc 100644 --- a/drivers/pci/controller/pci-hyperv.c +++ b/drivers/pci/controller/pci-hyperv.c @@ -3021,7 +3021,12 @@ static int hv_pci_probe(struct hv_device *hdev, */ BUILD_BUG_ON(sizeof(*hbus) > HV_HYP_PAGE_SIZE); - bridge = devm_pci_alloc_host_bridge(&hdev->device, 0); + /* + * devm_pci_alloc_host_bridge() use kzalloc(), and we want to set + * ->private as a NULL pointer, therefore no need to set ->private after + * allocation. + */ + bridge = devm_pci_alloc_host_bridge(&hdev->device, sizeof(struct acpi_device *)); if (!bridge) return -ENOMEM;