From: Manivannan Sadhasivam manivannan.sadhasivam@linaro.org
commit a33d700e8eea76c62120cb3dbf5e01328f18319a upstream.
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.
Link: https://lore.kernel.org/r/20230619150408.8468-2-manivannan.sadhasivam@linaro... Fixes: 5d76117f070d ("PCI: qcom: Add support for IPQ8074 PCIe controller") Signed-off-by: Manivannan Sadhasivam manivannan.sadhasivam@linaro.org Signed-off-by: Lorenzo Pieralisi lpieralisi@kernel.org Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/pci/controller/dwc/pcie-qcom.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/pci/controller/dwc/pcie-qcom.c +++ b/drivers/pci/controller/dwc/pcie-qcom.c @@ -1134,6 +1134,8 @@ static int qcom_pcie_post_init_2_3_3(str writel(PCI_EXP_DEVCTL2_COMP_TMOUT_DIS, pci->dbi_base + offset + PCI_EXP_DEVCTL2);
+ dw_pcie_dbi_ro_wr_dis(pci); + return 0; }