PCI: layerscape: Add support for link-down notification

nxpfrankli · Lorenzo Pieralisi · commit d28c0d84ca40 · 2023-08-24T10:06:59.000+02:00
Add support to pass link-down notification to the endpoint function driver so that it can process the LINK_DOWN event. Link: https://lore.kernel.org/r/20230720135834.1977616-1-Frank.Li@nxp.com Signed-off-by: Frank Li <Frank.Li@nxp.com> Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org> Acked-by: Manivannan Sadhasivam <mani@kernel.org>
diff --git a/drivers/pci/controller/dwc/pci-layerscape-ep.c b/drivers/pci/controller/dwc/pci-layerscape-ep.c
@@ -89,6 +89,7 @@ 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) {
 		dev_dbg(pci->dev, "Link down\n");
+		pci_epc_linkdown(pci->ep.epc);
 	} else if (val & PEX_PF0_PME_MES_DR_HRD) {
 		dev_dbg(pci->dev, "Hot reset\n");
 	}

Original file line number	Diff line number	Diff line change
`@@ -89,6 +89,7 @@ static irqreturn_t ls_pcie_ep_event_handler(int irq, void *dev_id)`
`89`	`89`	`dev_dbg(pci->dev, "Link up\n");`
`90`	`90`	`} else if (val & PEX_PF0_PME_MES_DR_LDD) {`
`91`	`91`	`dev_dbg(pci->dev, "Link down\n");`
	`92`	`+ pci_epc_linkdown(pci->ep.epc);`
`92`	`93`	`} else if (val & PEX_PF0_PME_MES_DR_HRD) {`
`93`	`94`	`dev_dbg(pci->dev, "Hot reset\n");`
`94`	`95`	`}`