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Wysocki" , Mika Westerberg , Bjorn Helgaas CC: , , "Andy Shevchenko" , , Kuppuswamy Sathyanarayanan , "Iain Lane" , Shyam-sundar S-k , Mario Limonciello Subject: [PATCH v11 8/9] PCI: Split PME state selection into a local static function Date: Wed, 9 Aug 2023 13:54:52 -0500 Message-ID: <20230809185453.40916-9-mario.limonciello@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230809185453.40916-1-mario.limonciello@amd.com> References: <20230809185453.40916-1-mario.limonciello@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1PEPF000042A9:EE_|DS0PR12MB8342:EE_ X-MS-Office365-Filtering-Correlation-Id: da5aeb87-5ed5-4666-71f3-08db991172b0 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230028)(4636009)(346002)(136003)(376002)(396003)(39860400002)(451199021)(82310400008)(1800799006)(186006)(46966006)(40470700004)(36840700001)(6666004)(7696005)(40460700003)(86362001)(1076003)(26005)(40480700001)(47076005)(426003)(83380400001)(2616005)(36756003)(36860700001)(16526019)(336012)(81166007)(356005)(82740400003)(44832011)(316002)(41300700001)(8676002)(8936002)(2906002)(4326008)(70586007)(70206006)(478600001)(54906003)(5660300002)(110136005)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Aug 2023 19:47:21.9310 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: da5aeb87-5ed5-4666-71f3-08db991172b0 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: CO1PEPF000042A9.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR12MB8342 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org When a device is not power manageable by the platform, and not already in a low power state pci_target_state() will find the deepest state that PME is supported and use this to select the wakeup state. Simplify this logic and split it out to a local function. No intended functional changes. Signed-off-by: Mario Limonciello --- v10->v11: * New patch split from existing patch in v10 --- drivers/pci/pci.c | 31 ++++++++++++++++--------------- 1 file changed, 16 insertions(+), 15 deletions(-) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 60230da957e0c..693f4ca90452b 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -2660,6 +2660,20 @@ int pci_wake_from_d3(struct pci_dev *dev, bool enable) } EXPORT_SYMBOL(pci_wake_from_d3); +/* + * Find the deepest state from which the device can generate + * PME#. + */ +static inline pci_power_t pci_get_wake_pme_state(struct pci_dev *dev) +{ + pci_power_t state = PCI_D3hot; + + while (state && !(dev->pme_support & (1 << state))) + state--; + + return state; +} + /** * pci_target_state - find an appropriate low power state for a given PCI dev * @dev: PCI device @@ -2701,21 +2715,8 @@ static pci_power_t pci_target_state(struct pci_dev *dev, bool wakeup) else if (!dev->pm_cap) return PCI_D0; - if (wakeup && dev->pme_support) { - pci_power_t state = PCI_D3hot; - - /* - * Find the deepest state from which the device can generate - * PME#. - */ - while (state && !(dev->pme_support & (1 << state))) - state--; - - if (state) - return state; - else if (dev->pme_support & 1) - return PCI_D0; - } + if (wakeup && dev->pme_support) + return pci_get_wake_pme_state(dev); return PCI_D3hot; }