diff --git a/drivers/net/sfc/sfe4001.c b/drivers/net/sfc/sfe4001.c
index cee00ad49b5725e86c0f5b60cf6f995f5b8717b7..49eb91b5f50c8c9381b5da5cae2c78581364c080 100644
--- a/drivers/net/sfc/sfe4001.c
+++ b/drivers/net/sfc/sfe4001.c
@@ -188,7 +188,7 @@ static int sfn4111t_reset(struct efx_nic *efx)
 	efx_oword_t reg;
 
 	/* GPIO 3 and the GPIO register are shared with I2C, so block that */
-	mutex_lock(&efx->i2c_adap.bus_lock);
+	i2c_lock_adapter(&efx->i2c_adap);
 
 	/* Pull RST_N (GPIO 2) low then let it up again, setting the
 	 * FLASH_CFG_1 strap (GPIO 3) appropriately.  Only change the
@@ -204,7 +204,7 @@ static int sfn4111t_reset(struct efx_nic *efx)
 	falcon_write(efx, &reg, GPIO_CTL_REG_KER);
 	msleep(1);
 
-	mutex_unlock(&efx->i2c_adap.bus_lock);
+	i2c_unlock_adapter(&efx->i2c_adap);
 
 	ssleep(1);
 	return 0;
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 57d41b0abce2a9988c123c6b177e54d811be1ebe..7b40cda57a702273fcbdeb7ba7487fdfe1406aff 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -361,6 +361,24 @@ static inline void i2c_set_adapdata(struct i2c_adapter *dev, void *data)
 	dev_set_drvdata(&dev->dev, data);
 }
 
+/**
+ * i2c_lock_adapter - Prevent access to an I2C bus segment
+ * @adapter: Target I2C bus segment
+ */
+static inline void i2c_lock_adapter(struct i2c_adapter *adapter)
+{
+	mutex_lock(&adapter->bus_lock);
+}
+
+/**
+ * i2c_unlock_adapter - Reauthorize access to an I2C bus segment
+ * @adapter: Target I2C bus segment
+ */
+static inline void i2c_unlock_adapter(struct i2c_adapter *adapter)
+{
+	mutex_unlock(&adapter->bus_lock);
+}
+
 /*flags for the client struct: */
 #define I2C_CLIENT_PEC	0x04		/* Use Packet Error Checking */
 #define I2C_CLIENT_TEN	0x10		/* we have a ten bit chip address */