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Wed, 23 Sep 2026 00:22:51 -0700 From: Manikanta Maddireddy To: Lorenzo Pieralisi , Krzysztof Wilczynski , Manivannan Sadhasivam , "Bjorn Helgaas" , CC: Rob Herring , Thierry Reding , Jonathan Hunter , Kishon Vijay Abraham I , Frank Li , Vidya Sagar , Niklas Cassel , Koichiro Den , Marco Crivellari , "Andy Shevchenko" , , , "Manikanta Maddireddy" Subject: [PATCH 00/11] PCI: tegra194: Fix EP and Root Port corner cases Date: Wed, 23 Sep 2026 12:52:26 +0530 Message-ID: <20260923072237.1139013-1-mmaddireddy@nvidia.com> X-Mailer: git-send-email 2.34.1 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: rnnvmail201.nvidia.com (10.129.68.8) To rnnvmail201.nvidia.com (10.129.68.8) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PEPF00002315:EE_|CH2PR12MB4149:EE_ X-MS-Office365-Filtering-Correlation-Id: a45aa776-cee9-4c12-f5b0-08df19438449 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|36860700016|82310400026|7416014|376014|23010399003|56012099006|11063799006|6133799003|10067099003|18002099003; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: ou20JQYf+DphMQQHx76ay9rfUzEB2ztTsMO9z8s04z/ONDxAlaBh6/vArr5QsqR+KkucbxIiXo5RbKG76hjzoD6XBudxP07AwvftwvWNTZjINKuVl9kTDo1BWn7xMd8TmIREdBBrJhxY80LeE6kihC+lzqYePubFrjCv5vJTxopDhLhziVd2XHHoSD2s5BBXlYab2//tW+fGO85JZY+PR1CkgeXjVNBlRiRumq5UZ4F4eI+QU+wjnGOxVlXZWv/J+VVU86rCLhP0WAUq5x6hB3uQVU4ubBWFae8sgzSAJQr3svnjVwPjtwp38BsE6BJaRO2y04reZaSHktjJdClntE8JTmPgB9Q0LPss4tBiiMDqtqZ7LoJhfl5h78vunjj74s0vpdcqqzq+hBuABp6J5zl12Z9+6lCEXlbjMhIN1fc2FSGKvPnBfR5WJQsR5Jq5 X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Sep 2026 07:23:08.2476 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a45aa776-cee9-4c12-f5b0-08df19438449 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: SJ1PEPF00002315.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH2PR12MB4149 This series fixes a set of independent Tegra194/Tegra234 PCIe controller issues found while testing Root Port and Endpoint flows. The Root Port fixes tighten probe/remove and suspend/resume error handling: propagate optional GPIO failures, check reset deassertion, avoid skipping cleanup when no link came up, and balance the optional core monitor clock on failures. The Endpoint fixes cover PERST# IRQ suspend handling, PHY/PLL error unwinds, capability checks before programming optional PCIe extended capabilities, hiding Tegra234 EP L1.2 advertisement for the documented hardware limitation, and MSI/MSI-X handling. The MSI-X patches also keep pci_epf_test from relocating controller-owned MSI-X table/PBA storage when the EPC describes a fixed MSI-X BAR layout. The patches are ordered from low-level error handling toward endpoint capability/MSI-X fixes so each change remains reviewable and self-contained. Manikanta Maddireddy (11): PCI: tegra194: Propagate REFCLK select GPIO errors PCI: tegra194: Check core reset deassertion PCI: tegra194: Fix Endpoint PERST# IRQ suspend race PCI: tegra194: Do not skip no-link Root Port remove cleanup PCI: tegra194: Check for 16 GT/s capability before programming PCI: tegra194: Check for L1SS capability before programming PCI: tegra194: Always disable Tegra234 Endpoint L1.2 PCI: tegra194: Guard Endpoint PLL-off error path PCI: tegra194: Balance core monitor clock on failures PCI: tegra194: Fix Endpoint MSI/MSI-X numbering PCI: endpoint: test: Do not relocate fixed MSI-X tables drivers/pci/controller/dwc/pcie-tegra194.c | 243 ++++++++++++------ drivers/pci/endpoint/functions/pci-epf-test.c | 27 +- 2 files changed, 186 insertions(+), 84 deletions(-) -- 2.34.1