diff mbox series

[v4,1/9] PCI: qcom: Disable write access to read only registers for IP v2.3.3

Message ID 20230619150408.8468-2-manivannan.sadhasivam@linaro.org (mailing list archive)
State Not Applicable
Headers show
Series PCI: qcom: Do not advertise hotplug capability | expand

Commit Message

Manivannan Sadhasivam June 19, 2023, 3:04 p.m. UTC 
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.

Cc: <stable@vger.kernel.org>
Fixes: 5d76117f070d ("PCI: qcom: Add support for IPQ8074 PCIe controller")
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
 drivers/pci/controller/dwc/pcie-qcom.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 4ab30892f6ef..ef385d36d653 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -836,6 +836,8 @@  static int qcom_pcie_post_init_2_3_3(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);
+
 	return 0;
 }