From: Manivannan Sadhasivam manivannan.sadhasivam@linaro.org
[ Upstream commit 200b8f85f2021362adcc8efb575652a2aa44c099 ]
In the post init sequence of v2.9.0, write access to read only registers are not disabled after updating the registers. Fix it by disabling the access after register update.
While at it, let's also add a newline after existing dw_pcie_dbi_ro_wr_en() guard function to align with rest of the driver.
Link: https://lore.kernel.org/r/20230619150408.8468-4-manivannan.sadhasivam@linaro... Fixes: 0cf7c2efe8ac ("PCI: qcom: Add IPQ60xx support") Signed-off-by: Manivannan Sadhasivam manivannan.sadhasivam@linaro.org Signed-off-by: Lorenzo Pieralisi lpieralisi@kernel.org Reviewed-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pci/controller/dwc/pcie-qcom.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c index 77f4dc244b3f7..49905b2a99607 100644 --- a/drivers/pci/controller/dwc/pcie-qcom.c +++ b/drivers/pci/controller/dwc/pcie-qcom.c @@ -1403,6 +1403,7 @@ static int qcom_pcie_post_init_2_9_0(struct qcom_pcie *pcie) writel(0, pcie->parf + PARF_Q2A_FLUSH);
dw_pcie_dbi_ro_wr_en(pci); + writel(PCIE_CAP_SLOT_VAL, pci->dbi_base + offset + PCI_EXP_SLTCAP);
val = readl(pci->dbi_base + offset + PCI_EXP_LNKCAP); @@ -1412,6 +1413,8 @@ static int qcom_pcie_post_init_2_9_0(struct qcom_pcie *pcie) writel(PCI_EXP_DEVCTL2_COMP_TMOUT_DIS, pci->dbi_base + offset + PCI_EXP_DEVCTL2);
+ dw_pcie_dbi_ro_wr_dis(pci); + for (i = 0; i < 256; i++) writel(0, pcie->parf + PARF_BDF_TO_SID_TABLE_N + (4 * i));