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Thu, 21 Jul 2022 07:22:19 -0700 From: Vidya Sagar To: , , , , , , , CC: , , , , , , , , , Subject: [PATCH V6 11/16] PCI: tegra194: Clear bandwidth management status Date: Thu, 21 Jul 2022 19:50:47 +0530 Message-ID: <20220721142052.25971-12-vidyas@nvidia.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220721142052.25971-1-vidyas@nvidia.com> References: <20220721142052.25971-1-vidyas@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: d5084094-1cfa-46ef-229c-08da6b246ed9 X-MS-TrafficTypeDiagnostic: SJ0PR12MB5485:EE_ 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:12.22.5.234;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:InfoNoRecords;CAT:NONE;SFS:(13230016)(4636009)(136003)(376002)(39860400002)(346002)(396003)(46966006)(36840700001)(40470700004)(70206006)(54906003)(40460700003)(316002)(36860700001)(26005)(8676002)(47076005)(70586007)(336012)(86362001)(82310400005)(36756003)(186003)(2906002)(4326008)(110136005)(426003)(478600001)(7416002)(6666004)(8936002)(7696005)(40480700001)(81166007)(2616005)(41300700001)(1076003)(5660300002)(82740400003)(356005)(2101003)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Jul 2022 14:22:24.8127 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d5084094-1cfa-46ef-229c-08da6b246ed9 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[12.22.5.234];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT041.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR12MB5485 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In the event of a bandwidth management interrupt, clear the bandwidth management status in the configuration space also along with clearing corresponding status in the application logic register to avoid slew of interrupts. Signed-off-by: Vidya Sagar --- V6: * New addition in V6 based on Bjorn's review comment drivers/pci/controller/dwc/pcie-tegra194.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c index 23377425952a..5f1798d37572 100644 --- a/drivers/pci/controller/dwc/pcie-tegra194.c +++ b/drivers/pci/controller/dwc/pcie-tegra194.c @@ -370,6 +370,12 @@ static irqreturn_t tegra_pcie_rp_irq_handler(int irq, void *arg) apply_bad_link_workaround(pp); } if (status_l1 & APPL_INTR_STATUS_L1_8_0_BW_MGT_INT_STS) { + val_w = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base + + PCI_EXP_LNKSTA); + val_w |= PCI_EXP_LNKSTA_LBMS; + dw_pcie_writew_dbi(pci, pcie->pcie_cap_base + + PCI_EXP_LNKSTA, val_w); + appl_writel(pcie, APPL_INTR_STATUS_L1_8_0_BW_MGT_INT_STS, APPL_INTR_STATUS_L1_8_0); -- 2.17.1