2 files changed, 20 insertions, 2 deletions

diff --git a/drivers/net/sfc/sfe4001.c b/drivers/net/sfc/sfe4001.c
index cee00ad49b57..49eb91b5f50c 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 57d41b0abce2..7b40cda57a70 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 */