diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 2e29ab841b4d..7a8f63c4a74c 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -365,9 +365,9 @@ static int mdiobus_create_device(struct mii_bus *bus,
  */
 int __mdiobus_register(struct mii_bus *bus, struct module *owner)
 {
-	struct mdio_device *mdiodev;
+	struct mdio_device *mdiodev = NULL;
 	int i, err;
-	struct gpio_desc *gpiod;
+	struct gpio_desc *gpiod = NULL;
 
 	if (NULL == bus || NULL == bus->name ||
 	    NULL == bus->read || NULL == bus->write)
@@ -410,7 +410,7 @@ int __mdiobus_register(struct mii_bus *bus, struct module *owner)
 
 	for (i = 0; i < PHY_MAX_ADDR; i++) {
 		if ((bus->phy_mask & (1 << i)) == 0) {
-			struct phy_device *phydev;
+			struct phy_device *phydev = NULL;
 
 			phydev = mdiobus_scan(bus, i);
 			if (IS_ERR(phydev) && (PTR_ERR(phydev) != -ENODEV)) {
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index adb66a2fae18..b8fb820d1544 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -576,8 +576,8 @@ struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id,
 				     bool is_c45,
 				     struct phy_c45_device_ids *c45_ids)
 {
-	struct phy_device *dev;
-	struct mdio_device *mdiodev;
+	struct phy_device *dev = NULL;
+	struct mdio_device *mdiodev = NULL;
 	int ret = 0;
 
 	/* We allocate the device, and initialize the default values */
@@ -776,7 +776,7 @@ static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id,
 static int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id,
 		      bool is_c45, struct phy_c45_device_ids *c45_ids)
 {
-	int phy_reg;
+	int phy_reg = 0;
 
 	if (is_c45)
 		return get_phy_c45_ids(bus, addr, phy_id, c45_ids);
@@ -834,7 +834,7 @@ EXPORT_SYMBOL(get_phy_device);
  */
 int phy_device_register(struct phy_device *phydev)
 {
-	int err;
+	int err = 0;
 
 	err = mdiobus_register_device(&phydev->mdio);
 	if (err)
diff --git a/drivers/net/usb/asix_common.c b/drivers/net/usb/asix_common.c
index e39f41efda3e..55fee2b6b481 100644
--- a/drivers/net/usb/asix_common.c
+++ b/drivers/net/usb/asix_common.c
@@ -445,7 +445,7 @@ int asix_mdio_read(struct net_device *netdev, int phy_id, int loc)
 {
 	struct usbnet *dev = netdev_priv(netdev);
 	__le16 res;
-	u8 smsr;
+	u8 smsr = 0;
 	int i = 0;
 	int ret;
 
@@ -478,7 +478,7 @@ void asix_mdio_write(struct net_device *netdev, int phy_id, int loc, int val)
 {
 	struct usbnet *dev = netdev_priv(netdev);
 	__le16 res = cpu_to_le16(val);
-	u8 smsr;
+	u8 smsr = 0;
 	int i = 0;
 	int ret;
 
@@ -509,7 +509,7 @@ int asix_mdio_read_nopm(struct net_device *netdev, int phy_id, int loc)
 {
 	struct usbnet *dev = netdev_priv(netdev);
 	__le16 res;
-	u8 smsr;
+	u8 smsr = 0;
 	int i = 0;
 	int ret;
 
diff --git a/drivers/net/usb/ax88172a.c b/drivers/net/usb/ax88172a.c
index 011bd4cb546e..cc9f1356c5d8 100644
--- a/drivers/net/usb/ax88172a.c
+++ b/drivers/net/usb/ax88172a.c
@@ -183,7 +183,7 @@ static int ax88172a_reset_phy(struct usbnet *dev, int embd_phy)
 static int ax88172a_bind(struct usbnet *dev, struct usb_interface *intf)
 {
 	int ret;
-	u8 buf[ETH_ALEN];
+	u8 buf[ETH_ALEN] = {0};
 	struct ax88172a_private *priv;
 
 	usbnet_get_endpoints(dev, intf);