diff --git a/arch/mips/tx4938/toshiba_rbtx4938/setup.c b/arch/mips/tx4938/toshiba_rbtx4938/setup.c
index 4a8152375efe..632e5d201353 100644
--- a/arch/mips/tx4938/toshiba_rbtx4938/setup.c
+++ b/arch/mips/tx4938/toshiba_rbtx4938/setup.c
@@ -598,8 +598,8 @@ static int __init rbtx4938_ethaddr_init(void)
 			printk(KERN_WARNING "seeprom: bad checksum.\n");
 	}
 	for (i = 0; i < 2; i++) {
-		unsigned int slot = TX4938_PCIC_IDSEL_AD_TO_SLOT(31 - i);
-		unsigned int id = (1 << 8) | PCI_DEVFN(slot, 0); /* bus 1 */
+		unsigned int id =
+			TXX9_IRQ_BASE + (i ? TX4938_IR_ETH1 : TX4938_IR_ETH0);
 		struct platform_device *pdev;
 		if (!(tx4938_ccfgptr->pcfg &
 		      (i ? TX4938_PCFG_ETH1_SEL : TX4938_PCFG_ETH0_SEL)))
diff --git a/drivers/net/tc35815.c b/drivers/net/tc35815.c
index d887c05588d5..370d329d15d9 100644
--- a/drivers/net/tc35815.c
+++ b/drivers/net/tc35815.c
@@ -611,7 +611,7 @@ static int __devinit tc35815_mac_match(struct device *dev, void *data)
 {
 	struct platform_device *plat_dev = to_platform_device(dev);
 	struct pci_dev *pci_dev = data;
-	unsigned int id = (pci_dev->bus->number << 8) | pci_dev->devfn;
+	unsigned int id = pci_dev->irq;
 	return !strcmp(plat_dev->name, "tc35815-mac") && plat_dev->id == id;
 }