To ensure write completion, read the PARF_LTSSM register after setting the LTSSM enable bit before polling for "link up". Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx> --- drivers/pci/controller/dwc/pcie-qcom.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c index a02dc197c495..3d77269e70da 100644 --- a/drivers/pci/controller/dwc/pcie-qcom.c +++ b/drivers/pci/controller/dwc/pcie-qcom.c @@ -540,6 +540,7 @@ static void qcom_pcie_2_3_2_ltssm_enable(struct qcom_pcie *pcie) val = readl(pcie->parf + PARF_LTSSM); val |= LTSSM_EN; writel(val, pcie->parf + PARF_LTSSM); + readl(pcie->parf + PARF_LTSSM); } static int qcom_pcie_get_resources_2_3_2(struct qcom_pcie *pcie) -- 2.43.0
