Message ID | 20211104125449.16540-35-tim.gardner@canonical.com |
---|---|
State | New |
Headers | show
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Thu, 04 Nov 2021 05:55:40 -0700 (PDT) Received: from localhost.localdomain ([69.163.84.166]) by smtp.gmail.com with ESMTPSA id y4sm5283859pfi.178.2021.11.04.05.55.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 04 Nov 2021 05:55:39 -0700 (PDT) From: Tim Gardner <tim.gardner@canonical.com> To: kernel-team@lists.ubuntu.com Subject: [PATCH 34/41] arm64: PCI: Support root bridge preparation for Hyper-V Date: Thu, 4 Nov 2021 06:54:42 -0600 Message-Id: <20211104125449.16540-35-tim.gardner@canonical.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211104125449.16540-1-tim.gardner@canonical.com> References: <20211104125449.16540-1-tim.gardner@canonical.com> MIME-Version: 1.0 X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.20 Precedence: list List-Id: Kernel team discussions <kernel-team.lists.ubuntu.com> List-Unsubscribe: <https://lists.ubuntu.com/mailman/options/kernel-team>, <mailto:kernel-team-request@lists.ubuntu.com?subject=unsubscribe> List-Archive: <https://lists.ubuntu.com/archives/kernel-team> List-Post: <mailto:kernel-team@lists.ubuntu.com> List-Help: <mailto:kernel-team-request@lists.ubuntu.com?subject=help> List-Subscribe: <https://lists.ubuntu.com/mailman/listinfo/kernel-team>, <mailto:kernel-team-request@lists.ubuntu.com?subject=subscribe> Content-Type: text/plain; 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diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c index 5148ae242780..2276689b5411 100644 --- a/arch/arm64/kernel/pci.c +++ b/arch/arm64/kernel/pci.c @@ -90,7 +90,17 @@ int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge) return 0; cfg = bridge->bus->sysdata; - adev = to_acpi_device(cfg->parent); + + /* + * On Hyper-V there is no corresponding ACPI device for a root bridge, + * therefore ->parent is set as NULL by the driver. And set 'adev' as + * NULL in this case because there is no proper ACPI device. + */ + if (!cfg->parent) + adev = NULL; + else + adev = to_acpi_device(cfg->parent); + bus_dev = &bridge->bus->dev; ACPI_COMPANION_SET(&bridge->dev, adev);