net: stmmac: dwmac-loongson: Drop pci_enable/disable_msi calls

The Loongson GMAC driver currently doesn't utilize the MSI IRQs, but
retrieves the IRQs specified in the device DT-node. Let's drop the
direct pci_enable_msi()/pci_disable_msi() calls then as redundant
Signed-off-by: Feiyang Chen <chenfeiyang@loongson.cn>
Signed-off-by: Yinggang Gu <guyinggang@loongson.cn>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Acked-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Yanteng Si <siyanteng@loongson.cn>
Tested-by: Serge Semin <fancer.lancer@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c

@@ -114,7 +114,6 @@ static int loongson_dwmac_probe(struct pci_dev *pdev, const struct pci_device_id
 	pci_set_master(pdev);
 
 	loongson_default_data(plat);
-	pci_enable_msi(pdev);
 	memset(&res, 0, sizeof(res));
 	res.addr = pcim_iomap_table(pdev)[0];
 
@@ -122,7 +121,7 @@ static int loongson_dwmac_probe(struct pci_dev *pdev, const struct pci_device_id
 	if (res.irq < 0) {
 		dev_err(&pdev->dev, "IRQ macirq not found\n");
 		ret = -ENODEV;
-		goto err_disable_msi;
+		goto err_disable_device;
 	}
 
 	res.wol_irq = of_irq_get_byname(np, "eth_wake_irq");
@@ -135,17 +134,15 @@ static int loongson_dwmac_probe(struct pci_dev *pdev, const struct pci_device_id
 	if (res.lpi_irq < 0) {
 		dev_err(&pdev->dev, "IRQ eth_lpi not found\n");
 		ret = -ENODEV;
-		goto err_disable_msi;
+		goto err_disable_device;
 	}
 
 	ret = stmmac_dvr_probe(&pdev->dev, plat, &res);
 	if (ret)
-		goto err_disable_msi;
+		goto err_disable_device;
 
 	return ret;
 
-err_disable_msi:
-	pci_disable_msi(pdev);
 err_disable_device:
 	pci_disable_device(pdev);
 err_put_node:
@@ -169,7 +166,6 @@ static void loongson_dwmac_remove(struct pci_dev *pdev)
 		break;
 	}
 
-	pci_disable_msi(pdev);
 	pci_disable_device(pdev);
 }