PCI: qcom-ep: Add support for Link down notification

Add support to pass Link down notification to Endpoint function driver so
that the LINK_DOWN event can be processed by the function.

Link: https://lore.kernel.org/r/20230602114756.36586-7-manivannan.sadhasivam@linaro.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Kishon Vijay Abraham I <kishon@kernel.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>

diff --git a/drivers/pci/controller/dwc/pcie-qcom-ep.c b/drivers/pci/controller/dwc/pcie-qcom-ep.c
index 19b32839ea2610ae7cbee6d5870a5582632691e0..4ce01ff7527c4e223f4be1e4f6a5acdd65d74841 100644 (file)
--- a/drivers/pci/controller/dwc/pcie-qcom-ep.c
+++ b/drivers/pci/controller/dwc/pcie-qcom-ep.c
@@ -569,6 +569,7 @@ static irqreturn_t qcom_pcie_ep_global_irq_thread(int irq, void *data)
        if (FIELD_GET(PARF_INT_ALL_LINK_DOWN, status)) {
                dev_dbg(dev, "Received Linkdown event\n");
                pcie_ep->link_status = QCOM_PCIE_EP_LINK_DOWN;
+               pci_epc_linkdown(pci->ep.epc);
        } else if (FIELD_GET(PARF_INT_ALL_BME, status)) {
                dev_dbg(dev, "Received BME event. Link is enabled!\n");
                pcie_ep->link_status = QCOM_PCIE_EP_LINK_ENABLED;