diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 122876cb926c667fd33f5288b9ccd4b819f2db4e..b2c25daef294e3abad241f310717698048ca5b6a 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -216,16 +216,16 @@ int mv88e6xxx_write(struct mv88e6xxx_chip *chip, int addr, int reg, u16 val)
 	return 0;
 }
 
-int mv88e6xxx_port_read(struct mv88e6xxx_chip *chip, int port, int reg,
-			u16 *val)
+static int mv88e6xxx_port_read(struct mv88e6xxx_chip *chip, int port, int reg,
+			       u16 *val)
 {
 	int addr = chip->info->port_base_addr + port;
 
 	return mv88e6xxx_read(chip, addr, reg, val);
 }
 
-int mv88e6xxx_port_write(struct mv88e6xxx_chip *chip, int port, int reg,
-			 u16 val)
+static int mv88e6xxx_port_write(struct mv88e6xxx_chip *chip, int port, int reg,
+				u16 val)
 {
 	int addr = chip->info->port_base_addr + port;