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Thu, 14 Mar 2024 08:24:10 -0700 (PDT) Received: from [127.0.1.1] ([117.207.30.211]) by smtp.gmail.com with ESMTPSA id m4-20020a63ed44000000b005e438ea2a5asm824021pgk.53.2024.03.14.08.24.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 Mar 2024 08:24:10 -0700 (PDT) From: Manivannan Sadhasivam Date: Thu, 14 Mar 2024 20:53:40 +0530 Subject: [PATCH 01/11] PCI: qcom-ep: Disable resources unconditionally during PERST# assert Precedence: bulk X-Mailing-List: linux-tegra@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240314-pci-epf-rework-v1-1-6134e6c1d491@linaro.org> References: <20240314-pci-epf-rework-v1-0-6134e6c1d491@linaro.org> In-Reply-To: <20240314-pci-epf-rework-v1-0-6134e6c1d491@linaro.org> To: Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy?= =?utf-8?q?=C5=84ski?= , Rob Herring , Bjorn Helgaas , Kishon Vijay Abraham I , Thierry Reding , Jonathan Hunter , Jingoo Han , Gustavo Pimentel Cc: linux-pci@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, mhi@lists.linux.dev, linux-tegra@vger.kernel.org, Manivannan Sadhasivam X-Mailer: b4 0.12.4 X-Developer-Signature: v=1; a=openpgp-sha256; l=1341; i=manivannan.sadhasivam@linaro.org; h=from:subject:message-id; bh=JRZLwKxhEM0x8HfB67G9+Fzppqg8xFqlyA8aRxI9XHM=; b=owEBbQGS/pANAwAKAVWfEeb+kc71AcsmYgBl8xaOLrQOPVb1HVr/175Bwj4SLK9E64perYmGL IBSuWUMVHGJATMEAAEKAB0WIQRnpUMqgUjL2KRYJ5dVnxHm/pHO9QUCZfMWjgAKCRBVnxHm/pHO 9ROLCACSxVDvqf0sTonqAB4efCgXpbE8NA//bIFdXLvO2DxsLrdraqYdwvMEiH+CAtxrSHwW3cE FCGe61CdFCnn3hhtoh05WnTStcOoxu7X2p8Lah7zUn7BBg7dScjvASClkPt0iqwsQjNhi0LmwHW xSofd+6XrLFHrATDGnodX1uVN2PcZZSXJdHw5oINOdggFxeHD1m9exuzvl6s5gY5SJ3lgg4q8Nw SZ86dARIy67pxK4Tkui+6vLp8YpJuby4gtksND4QVksT3VGTatVl30dDQE+e86Ntl1YgSKaJost K6XAXGDFLhZf0jQo8+mwwqh3P5s4NtOxeKumlgu2yg6kSQ4B X-Developer-Key: i=manivannan.sadhasivam@linaro.org; a=openpgp; fpr=C668AEC3C3188E4C611465E7488550E901166008 All EP specific resources are enabled during PERST# deassert. As a counter operation, all resources should be disabled during PERST# assert. There is no point in skipping that if the link was not enabled. This will also result in enablement of the resources twice if PERST# got deasserted again. So remove the check from qcom_pcie_perst_assert() and disable all the resources unconditionally. Fixes: f55fee56a631 ("PCI: qcom-ep: Add Qualcomm PCIe Endpoint controller driver") Signed-off-by: Manivannan Sadhasivam Reviewed-by: Niklas Cassel --- drivers/pci/controller/dwc/pcie-qcom-ep.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-qcom-ep.c b/drivers/pci/controller/dwc/pcie-qcom-ep.c index 2fb8c15e7a91..50b1635e3cbb 100644 --- a/drivers/pci/controller/dwc/pcie-qcom-ep.c +++ b/drivers/pci/controller/dwc/pcie-qcom-ep.c @@ -500,12 +500,6 @@ static int qcom_pcie_perst_deassert(struct dw_pcie *pci) static void qcom_pcie_perst_assert(struct dw_pcie *pci) { struct qcom_pcie_ep *pcie_ep = to_pcie_ep(pci); - struct device *dev = pci->dev; - - if (pcie_ep->link_status == QCOM_PCIE_EP_LINK_DISABLED) { - dev_dbg(dev, "Link is already disabled\n"); - return; - } dw_pcie_ep_cleanup(&pci->ep); qcom_pcie_disable_resources(pcie_ep);