From: Emil Tantilov <emil.s.tantilov@intel.com>
Date: Fri, 4 Nov 2011 06:43:23 +0000 (+0000)
Subject: ixgbe: add write flush in ixgbe_clock_out_i2c_byte()
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=176f950d310c81b7fafd96aabe53704f778ce269;p=deliverable%2Flinux.git

ixgbe: add write flush in ixgbe_clock_out_i2c_byte()

I2C access is timing critical. Always do a write flush after writing
to the I2CCTL register.

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>
---

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c
index 8b113e3f16f5..7cf1e1f56c69 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c
@@ -1457,6 +1457,7 @@ static s32 ixgbe_clock_out_i2c_byte(struct ixgbe_hw *hw, u8 data)
 	i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL);
 	i2cctl |= IXGBE_I2C_DATA_OUT;
 	IXGBE_WRITE_REG(hw, IXGBE_I2CCTL, i2cctl);
+	IXGBE_WRITE_FLUSH(hw);
 
 	return status;
 }