e1000e: Workaround for dropped packets in Gig/100 speeds on 82579

[uclinux-h8/linux.git] / drivers / net / ethernet / intel / e1000e / ich8lan.c

diff --git a/drivers/net/ethernet/intel/e1000e/ich8lan.c b/drivers/net/ethernet/intel/e1000e/ich8lan.c
index 9866f26..9b736b8 100644 (file)
--- a/drivers/net/ethernet/intel/e1000e/ich8lan.c
+++ b/drivers/net/ethernet/intel/e1000e/ich8lan.c
@@ -2493,51 +2493,44 @@ release:
  *  e1000_k1_gig_workaround_lv - K1 Si workaround
  *  @hw:   pointer to the HW structure
  *
- *  Workaround to set the K1 beacon duration for 82579 parts
+ *  Workaround to set the K1 beacon duration for 82579 parts in 10Mbps
+ *  Disable K1 in 1000Mbps and 100Mbps
  **/
 static s32 e1000_k1_workaround_lv(struct e1000_hw *hw)
 {
        s32 ret_val = 0;
        u16 status_reg = 0;
-       u32 mac_reg;
-       u16 phy_reg;
 
        if (hw->mac.type != e1000_pch2lan)
                return 0;
 
-       /* Set K1 beacon duration based on 1Gbps speed or otherwise */
+       /* Set K1 beacon duration based on 10Mbs speed */
        ret_val = e1e_rphy(hw, HV_M_STATUS, &status_reg);
        if (ret_val)
                return ret_val;
 
        if ((status_reg & (HV_M_STATUS_LINK_UP | HV_M_STATUS_AUTONEG_COMPLETE))
            == (HV_M_STATUS_LINK_UP | HV_M_STATUS_AUTONEG_COMPLETE)) {
-               mac_reg = er32(FEXTNVM4);
-               mac_reg &= ~E1000_FEXTNVM4_BEACON_DURATION_MASK;
-
-               ret_val = e1e_rphy(hw, I82579_LPI_CTRL, &phy_reg);
-               if (ret_val)
-                       return ret_val;
-
-               if (status_reg & HV_M_STATUS_SPEED_1000) {
+               if (status_reg &
+                   (HV_M_STATUS_SPEED_1000 | HV_M_STATUS_SPEED_100)) {
                        u16 pm_phy_reg;
 
-                       mac_reg |= E1000_FEXTNVM4_BEACON_DURATION_8USEC;
-                       phy_reg &= ~I82579_LPI_CTRL_FORCE_PLL_LOCK_COUNT;
-                       /* LV 1G Packet drop issue wa  */
+                       /* LV 1G/100 Packet drop issue wa  */
                        ret_val = e1e_rphy(hw, HV_PM_CTRL, &pm_phy_reg);
                        if (ret_val)
                                return ret_val;
-                       pm_phy_reg &= ~HV_PM_CTRL_PLL_STOP_IN_K1_GIGA;
+                       pm_phy_reg &= ~HV_PM_CTRL_K1_ENABLE;
                        ret_val = e1e_wphy(hw, HV_PM_CTRL, pm_phy_reg);
                        if (ret_val)
                                return ret_val;
                } else {
+                       u32 mac_reg;
+
+                       mac_reg = er32(FEXTNVM4);
+                       mac_reg &= ~E1000_FEXTNVM4_BEACON_DURATION_MASK;
                        mac_reg |= E1000_FEXTNVM4_BEACON_DURATION_16USEC;
-                       phy_reg |= I82579_LPI_CTRL_FORCE_PLL_LOCK_COUNT;
+                       ew32(FEXTNVM4, mac_reg);
                }
-               ew32(FEXTNVM4, mac_reg);
-               ret_val = e1e_wphy(hw, I82579_LPI_CTRL, phy_reg);
        }
 
        return ret_val;