--- a/arch/mips/ar71xx/devices.c
+++ b/arch/mips/ar71xx/devices.c
@@ -792,6 +792,8 @@ static struct platform_device ar71xx_dsa
 void __init ar71xx_add_device_dsa(unsigned int id,
 				  struct dsa_platform_data *d)
 {
+	int i;
+
 	switch (id) {
 	case 0:
 		d->netdev = &ar71xx_eth0_device.dev;
@@ -805,7 +807,10 @@ void __init ar71xx_add_device_dsa(unsign
 			id);
 		return;
 	}
-	d->mii_bus = &ar71xx_mdio_device.dev;
+
+	for (i = 0; i < d->nr_chips; i++)
+		d->chip[i].mii_bus = &ar71xx_mdio_device.dev;
+
 	ar71xx_dsa_switch_device.dev.platform_data = d;
 
 	platform_device_register(&ar71xx_dsa_switch_device);
--- a/arch/mips/ar71xx/mach-tl-wr941nd.c
+++ b/arch/mips/ar71xx/mach-tl-wr941nd.c
@@ -104,7 +104,7 @@ static struct gpio_button tl_wr941nd_gpi
 	}
 };
 
-static struct dsa_platform_data tl_wr941nd_dsa_data = {
+static struct dsa_chip_data tl_wr941nd_dsa_chip = {
 	.port_names[0]  = "wan",
 	.port_names[1]  = "lan1",
 	.port_names[2]  = "lan2",
@@ -113,6 +113,11 @@ static struct dsa_platform_data tl_wr941
 	.port_names[5]  = "cpu",
 };
 
+static struct dsa_platform_data tl_wr941nd_dsa_data = {
+	.nr_chips	= 1,
+	.chip		= &tl_wr941nd_dsa_chip,
+};
+
 static void __init tl_wr941nd_setup(void)
 {
 	u8 *mac = (u8 *) KSEG1ADDR(0x1f01fc00);