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Mon, 2 Mar 2026 22:56:39 -0800 From: Manikanta Maddireddy To: , , , , , , , , , , , , , , , , , , <18255117159@163.com> CC: , , , Manikanta Maddireddy Subject: [PATCH v7 13/13] PCI: tegra194: Free resources during controller deinitialization Date: Tue, 3 Mar 2026 12:24:48 +0530 Message-ID: <20260303065448.2361488-14-mmaddireddy@nvidia.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260303065448.2361488-1-mmaddireddy@nvidia.com> References: <20260303065448.2361488-1-mmaddireddy@nvidia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NVConfidentiality: public Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: rnnvmail202.nvidia.com (10.129.68.7) To rnnvmail201.nvidia.com (10.129.68.8) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN2PEPF00004FBF:EE_|SN7PR12MB6692:EE_ X-MS-Office365-Filtering-Correlation-Id: 8db696cd-464c-4477-5b80-08de78f210d1 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|1800799024|82310400026|36860700013|921020; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: s+HmuocoG2SVbBPEJLpBk6UoJzOL3rkbQI2TCmPns67+TgXI1jiSjrP8aNVgnafqPrXRgl+IsSw8nzaD9zJzPTCcpzhC3IKVAFr0KBm2Xf1cras9VIypiXjyWsIJInyKa4vXRgyDDCJwf3angMTXwuEHQuFG2frgPdCfh5bh88Ar6ewjB8XPboon5SX/IFa2QByxcTe30+N1CDecK4md4olQJ7lHLpyQlwtCKFMFrfyJWxyf3Q8sAPRbQtzykDSI/QvD8mHdxnMgjb4mi6T3SwAWa0FNykqFdAZvyk1yIDR2OhJJu3/eDqqgy92VvIxIeIyPPRpyJl+yabLtp4xu1HCa03jDk567r4gSSf1jNEwlxsdgn9O1ApoX2FIrch/dRtyA+SenfR3Z9sxrvaFUYbM4PoDkK9F90AdvqTaatvwA/vlFG+KPVWl5a7hIxw/N X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Mar 2026 06:56:59.0759 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 8db696cd-464c-4477-5b80-08de78f210d1 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN2PEPF00004FBF.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB6692 From: Vidya Sagar Call pci_epc_deinit_notify() during controller deinitialization to free the resources allocated by Endpoint function driver. This is safe to call during PCIe assert sequence because we don't expect Endpoint function driver to touch hardware in deinit function. Fixes: 40e2125381dc ("PCI: tegra194: Move controller cleanups to pex_ep_event_pex_rst_deassert()") Reviewed-by: Jon Hunter Tested-by: Jon Hunter Signed-off-by: Vidya Sagar Signed-off-by: Manikanta Maddireddy --- Changes V5 -> V7: None Changes V4 -> V5: Remove pci_epc_deinit_notify() call from pex_ep_event_pex_rst_deassert() Changes V1 -> V4: None drivers/pci/controller/dwc/pcie-tegra194.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c index a311c31109e3..b1ae46761915 100644 --- a/drivers/pci/controller/dwc/pcie-tegra194.c +++ b/drivers/pci/controller/dwc/pcie-tegra194.c @@ -1624,12 +1624,16 @@ static int tegra_pcie_config_rp(struct tegra_pcie_dw *pcie) static void pex_ep_event_pex_rst_assert(struct tegra_pcie_dw *pcie) { + struct dw_pcie *pci = &pcie->pci; + struct dw_pcie_ep *ep = &pci->ep; u32 val; int ret; if (pcie->ep_state == EP_STATE_DISABLED) return; + pci_epc_deinit_notify(ep->epc); + ret = readl_poll_timeout(pcie->appl_base + APPL_DEBUG, val, ((val & APPL_DEBUG_LTSSM_STATE_MASK) == LTSSM_STATE_DETECT_QUIET) || ((val & APPL_DEBUG_LTSSM_STATE_MASK) == LTSSM_STATE_DETECT_ACT) || @@ -1796,7 +1800,6 @@ static void pex_ep_event_pex_rst_deassert(struct tegra_pcie_dw *pcie) reset_control_deassert(pcie->core_rst); /* Perform cleanup that requires refclk and core reset deasserted */ - pci_epc_deinit_notify(pcie->pci.ep.epc); dw_pcie_ep_cleanup(&pcie->pci.ep); val = dw_pcie_readl_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL); -- 2.34.1