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 8b113e3..7cf1e1f 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c
@@ -1457,6 +1457,7 @@
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;
}