Merge branch 'pci/controller/loongson'

* pci/controller/loongson:
  PCI: loongson: Enable MSI in LS7A Root Complex

Author: bjorn-helgaas

drivers/pci/controller/pci-loongson.c

@@ -163,6 +163,19 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON,
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON,
 			DEV_LS7A_HDMI, loongson_pci_pin_quirk);
 
+static void loongson_pci_msi_quirk(struct pci_dev *dev)
+{
+	u16 val, class = dev->class >> 8;
+
+	if (class != PCI_CLASS_BRIDGE_HOST)
+		return;
+
+	pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &val);
+	val |= PCI_MSI_FLAGS_ENABLE;
+	pci_write_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, val);
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON, DEV_LS7A_PCIE_PORT5, loongson_pci_msi_quirk);
+
 static struct loongson_pci *pci_bus_to_loongson_pci(struct pci_bus *bus)
 {
 	struct pci_config_window *cfg;