[PATCH 01/11] PCI: qcom-ep: Disable resources unconditionally during PERST# assert

Manivannan Sadhasivam
2024-03-14T15:24:11Z

All EP specific resources are enabled during PERST# deassert. As a counter
operation, all resources should be disabled during PERST# assert. There is
no point in skipping that if the link was not enabled.

This will also result in enablement of the resources twice if PERST# got
deasserted again. So remove the check from qcom_pcie_perst_assert() and
disable all the resources unconditionally.

Fixes: f55fee56a631 ("PCI: qcom-ep: Add Qualcomm PCIe Endpoint controller driver")
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
drivers/pci/controller/dwc/pcie-qcom-ep.c | 6 ------
1 file changed, 6 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-qcom-ep.c b/drivers/pci/controller/dwc/pcie-qcom-ep.c
index 2fb8c15e7a91..50b1635e3cbb 100644
--- a/drivers/pci/controller/dwc/pcie-qcom-ep.c
+++ b/drivers/pci/controller/dwc/pcie-qcom-ep.c
@@ -500,12 +500,6 @@ static int qcom_pcie_perst_deassert(struct dw_pcie *pci)
static void qcom_pcie_perst_assert(struct dw_pcie *pci)
{
struct qcom_pcie_ep *pcie_ep = to_pcie_ep(pci);
- struct device *dev = pci->dev;
-
- if (pcie_ep->link_status == QCOM_PCIE_EP_LINK_DISABLED) {
- dev_dbg(dev, "Link is already disabled\n");
- return;
- }

dw_pcie_ep_cleanup(&pci->ep);
qcom_pcie_disable_resources(pcie_ep);

--
2.25.1