2 files changed, 15 insertions, 6 deletions

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c
index bf9f82f4b1ae..24117709d6a2 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c
@@ -1582,13 +1582,21 @@ static s32 ixgbe_clock_out_i2c_bit(struct ixgbe_hw *hw, bool data)
  **/
 static void ixgbe_raise_i2c_clk(struct ixgbe_hw *hw, u32 *i2cctl)
 {
-        *i2cctl |= IXGBE_I2C_CLK_OUT;
-
-        IXGBE_WRITE_REG(hw, IXGBE_I2CCTL, *i2cctl);
-        IXGBE_WRITE_FLUSH(hw);
+        u32 i = 0;
+        u32 timeout = IXGBE_I2C_CLOCK_STRETCHING_TIMEOUT;
+        u32 i2cctl_r = 0;
 
-        /* SCL rise time (1000ns) */
-        udelay(IXGBE_I2C_T_RISE);
+        for (i = 0; i < timeout; i++) {
+                *i2cctl |= IXGBE_I2C_CLK_OUT;
+                IXGBE_WRITE_REG(hw, IXGBE_I2CCTL, *i2cctl);
+                IXGBE_WRITE_FLUSH(hw);
+                /* SCL rise time (1000ns) */
+                udelay(IXGBE_I2C_T_RISE);
+
+                i2cctl_r = IXGBE_READ_REG(hw, IXGBE_I2CCTL);
+                if (i2cctl_r & IXGBE_I2C_CLK_IN)
+                        break;
+        }
 }
 
 /**
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
index ffa6679e943b..4acd9e665b28 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
@@ -110,6 +110,7 @@
 #define IXGBE_I2C_CLK_OUT   0x00000002
 #define IXGBE_I2C_DATA_IN   0x00000004
 #define IXGBE_I2C_DATA_OUT  0x00000008
+#define IXGBE_I2C_CLOCK_STRETCHING_TIMEOUT      500
 
 /* Interrupt Registers */
 #define IXGBE_EICR      0x00800