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Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; Received: from SATLEXMB04.amd.com (165.204.84.17) by BN8NAM11FT009.mail.protection.outlook.com (10.13.176.65) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.5102.17 via Frontend Transport; Mon, 28 Mar 2022 20:55:24 +0000 Received: from AUS-LX-MLIMONCI.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Mon, 28 Mar 2022 15:55:22 -0500 From: Mario Limonciello To: Bjorn Helgaas , "open list:PCI SUBSYSTEM" CC: , , Mario Limonciello , Bjorn Helgaas Subject: [PATCH v5 2/2] PCI / ACPI: Adjust comment about `HotPlugSupportInD3` Date: Mon, 28 Mar 2022 15:55:19 -0500 Message-ID: <20220328205519.250-2-mario.limonciello@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220328205519.250-1-mario.limonciello@amd.com> References: <20220328205519.250-1-mario.limonciello@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 47698720-300f-4789-29d8-08da10fd47b5 X-MS-TrafficTypeDiagnostic: MN0PR12MB5908:EE_ X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Mar 2022 20:55:24.1546 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 47698720-300f-4789-29d8-08da10fd47b5 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT009.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN0PR12MB5908 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org The comments in `acpi_pci_bridge_d3` make an assertion that all devices behind a PCIe root port that supports D3 also support D3. This was pointed out however that it's no guarantee but rather a reasonable assumption for the ecosystem used for Thunderbolt and USB4. Update the comment to use weaker language and clarifying this is an assumption. Suggested-by: Bjorn Helgaas Signed-off-by: Mario Limonciello --- v4->v5: * New patch drivers/pci/pci-acpi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index 91c165ea4346..4f12d4fca808 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -989,8 +989,8 @@ bool acpi_pci_bridge_d3(struct pci_dev *dev) /* * The ACPI firmware will provide the device-specific properties through * _DSD configuration object. Look for the 'HotPlugSupportInD3' property - * for the root port and if it is set we know the hierarchy behind it - * supports D3 just fine. + * for the root port and if it is set we make an assumption that the + * hierarchy behind it supports D3 as well. */ rpdev = pcie_find_root_port(dev); if (!rpdev) -- 2.34.1