ixgbe: remove return code for functions that always return 0

Since ixgbe_raise_i2c_clk() can never return anything else than 0
this patch removes it's return value and all checks for it.
Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c

@@ -39,7 +39,7 @@ static s32 ixgbe_clock_out_i2c_byte(struct ixgbe_hw *hw, u8 data);
 static s32 ixgbe_get_i2c_ack(struct ixgbe_hw *hw);
 static s32 ixgbe_clock_in_i2c_bit(struct ixgbe_hw *hw, bool *data);
 static s32 ixgbe_clock_out_i2c_bit(struct ixgbe_hw *hw, bool data);
-static s32 ixgbe_raise_i2c_clk(struct ixgbe_hw *hw, u32 *i2cctl);
+static void ixgbe_raise_i2c_clk(struct ixgbe_hw *hw, u32 *i2cctl);
 static void ixgbe_lower_i2c_clk(struct ixgbe_hw *hw, u32 *i2cctl);
 static s32 ixgbe_set_i2c_data(struct ixgbe_hw *hw, u32 *i2cctl, bool data);
 static bool ixgbe_get_i2c_data(u32 *i2cctl);
@@ -1420,19 +1420,15 @@ static void ixgbe_i2c_stop(struct ixgbe_hw *hw)
  **/
 static s32 ixgbe_clock_in_i2c_byte(struct ixgbe_hw *hw, u8 *data)
 {
-	s32 status = 0;
 	s32 i;
 	bool bit = 0;
 
 	for (i = 7; i >= 0; i--) {
-		status = ixgbe_clock_in_i2c_bit(hw, &bit);
+		ixgbe_clock_in_i2c_bit(hw, &bit);
 		*data |= bit << i;
-
-		if (status != 0)
-			break;
 	}
 
-	return status;
+	return 0;
 }
 
 /**
@@ -1473,16 +1469,14 @@ static s32 ixgbe_clock_out_i2c_byte(struct ixgbe_hw *hw, u8 data)
  **/
 static s32 ixgbe_get_i2c_ack(struct ixgbe_hw *hw)
 {
-	s32 status;
+	s32 status = 0;
 	u32 i = 0;
 	u32 i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL);
 	u32 timeout = 10;
 	bool ack = 1;
 
-	status = ixgbe_raise_i2c_clk(hw, &i2cctl);
+	ixgbe_raise_i2c_clk(hw, &i2cctl);
 
-	if (status != 0)
-		goto out;
 
 	/* Minimum high period of clock is 4us */
 	udelay(IXGBE_I2C_T_HIGH);
@@ -1508,7 +1502,6 @@ static s32 ixgbe_get_i2c_ack(struct ixgbe_hw *hw)
 	/* Minimum low period of clock is 4.7 us */
 	udelay(IXGBE_I2C_T_LOW);
 
-out:
 	return status;
 }
 
@@ -1521,10 +1514,9 @@ static s32 ixgbe_get_i2c_ack(struct ixgbe_hw *hw)
  **/
 static s32 ixgbe_clock_in_i2c_bit(struct ixgbe_hw *hw, bool *data)
 {
-	s32 status;
 	u32 i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL);
 
-	status = ixgbe_raise_i2c_clk(hw, &i2cctl);
+	ixgbe_raise_i2c_clk(hw, &i2cctl);
 
 	/* Minimum high period of clock is 4us */
 	udelay(IXGBE_I2C_T_HIGH);
@@ -1537,7 +1529,7 @@ static s32 ixgbe_clock_in_i2c_bit(struct ixgbe_hw *hw, bool *data)
 	/* Minimum low period of clock is 4.7 us */
 	udelay(IXGBE_I2C_T_LOW);
 
-	return status;
+	return 0;
 }
 
 /**
@@ -1554,7 +1546,7 @@ static s32 ixgbe_clock_out_i2c_bit(struct ixgbe_hw *hw, bool data)
 
 	status = ixgbe_set_i2c_data(hw, &i2cctl, data);
 	if (status == 0) {
-		status = ixgbe_raise_i2c_clk(hw, &i2cctl);
+		ixgbe_raise_i2c_clk(hw, &i2cctl);
 
 		/* Minimum high period of clock is 4us */
 		udelay(IXGBE_I2C_T_HIGH);
@@ -1579,10 +1571,8 @@ static s32 ixgbe_clock_out_i2c_bit(struct ixgbe_hw *hw, bool data)
  *
  *  Raises the I2C clock line '0'->'1'
  **/
-static s32 ixgbe_raise_i2c_clk(struct ixgbe_hw *hw, u32 *i2cctl)
+static void ixgbe_raise_i2c_clk(struct ixgbe_hw *hw, u32 *i2cctl)
 {
-	s32 status = 0;
-
 	*i2cctl |= IXGBE_I2C_CLK_OUT;
 
 	IXGBE_WRITE_REG(hw, IXGBE_I2CCTL, *i2cctl);
@@ -1590,8 +1580,6 @@ static s32 ixgbe_raise_i2c_clk(struct ixgbe_hw *hw, u32 *i2cctl)
 
 	/* SCL rise time (1000ns) */
 	udelay(IXGBE_I2C_T_RISE);
-
-	return status;
 }
 
 /**