linux-kernel - [PATCH 1/2] PCI: layerscape: Add support for Link down notification

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Date:   Thu, 15 Jun 2023 12:41:11 -0400
From:   Frank Li <Frank.Li@....com>
To:     mani@...nel.org, Minghuan Lian <minghuan.Lian@....com>,
        Mingkai Hu <mingkai.hu@....com>, Roy Zang <roy.zang@....com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Rob Herring <robh@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        linuxppc-dev@...ts.ozlabs.org (open list:PCI DRIVER FOR FREESCALE
        LAYERSCAPE),
        linux-pci@...r.kernel.org (open list:PCI DRIVER FOR FREESCALE
        LAYERSCAPE),
        linux-arm-kernel@...ts.infradead.org (moderated list:PCI DRIVER FOR
        FREESCALE LAYERSCAPE), linux-kernel@...r.kernel.org (open list)
Cc:     imx@...ts.linux.dev
Subject: [PATCH 1/2] PCI: layerscape: 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.

Signed-off-by: Frank Li <Frank.Li@....com>
---
 drivers/pci/controller/dwc/pci-layerscape-ep.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pci/controller/dwc/pci-layerscape-ep.c b/drivers/pci/controller/dwc/pci-layerscape-ep.c
index de4c1758a6c3..4e4fdd1dfea7 100644
--- a/drivers/pci/controller/dwc/pci-layerscape-ep.c
+++ b/drivers/pci/controller/dwc/pci-layerscape-ep.c
@@ -88,6 +88,7 @@ static irqreturn_t ls_pcie_ep_event_handler(int irq, void *dev_id)
 
 		dev_dbg(pci->dev, "Link up\n");
 	} else if (val & PEX_PF0_PME_MES_DR_LDD) {
+		pci_epc_linkdown(pci->ep.epc);
 		dev_dbg(pci->dev, "Link down\n");
 	} else if (val & PEX_PF0_PME_MES_DR_HRD) {
 		dev_dbg(pci->dev, "Hot reset\n");
-- 
2.34.1