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PCI: qcom: Disable write access to read only registers for IP v2.3.3

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commit a33d700e8e 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.org
Fixes: 5d76117f07 ("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>
This commit is contained in:
Manivannan Sadhasivam
2023-06-19 20:34:00 +05:30
committed by Greg Kroah-Hartman
parent d1ba97a65b
commit 3a4ecf4c9d
1 changed files with 2 additions and 0 deletions
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2
drivers/pci/controller/dwc/pcie-qcom.c
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@ -758,6 +758,8 @@ static int qcom_pcie_get_resources_2_4_0(struct qcom_pcie *pcie)
if (IS_ERR(res->phy_ahb_reset))
return PTR_ERR(res->phy_ahb_reset);
dw_pcie_dbi_ro_wr_dis(pci);
return 0;
}