1 files changed, 26 insertions, 4 deletions

diff --git a/drivers/net/ethernet/intel/e1000e/ich8lan.c b/drivers/net/ethernet/intel/e1000e/ich8lan.c
index 42f0f6717511..4f3da87f0cef 100644
--- a/drivers/net/ethernet/intel/e1000e/ich8lan.c
+++ b/drivers/net/ethernet/intel/e1000e/ich8lan.c
@@ -247,6 +247,7 @@ out:
  **/
 static s32 e1000_init_phy_workarounds_pchlan(struct e1000_hw *hw)
 {
+        struct e1000_adapter *adapter = hw->adapter;
         u32 mac_reg, fwsm = er32(FWSM);
         s32 ret_val;
 
@@ -349,12 +350,31 @@ static s32 e1000_init_phy_workarounds_pchlan(struct e1000_hw *hw)
 
         hw->phy.ops.release(hw);
         if (!ret_val) {
+
+                /* Check to see if able to reset PHY.  Print error if not */
+                if (hw->phy.ops.check_reset_block(hw)) {
+                        e_err("Reset blocked by ME\n");
+                        goto out;
+                }
+
                 /* Reset the PHY before any access to it.  Doing so, ensures
                  * that the PHY is in a known good state before we read/write
                  * PHY registers.  The generic reset is sufficient here,
                  * because we haven't determined the PHY type yet.
                  */
                 ret_val = e1000e_phy_hw_reset_generic(hw);
+                if (ret_val)
+                        goto out;
+
+                /* On a successful reset, possibly need to wait for the PHY
+                 * to quiesce to an accessible state before returning control
+                 * to the calling function.  If the PHY does not quiesce, then
+                 * return E1000E_BLK_PHY_RESET, as this is the condition that
+                 *  the PHY is in.
+                 */
+                ret_val = hw->phy.ops.check_reset_block(hw);
+                if (ret_val)
+                        e_err("ME blocked access to PHY after reset\n");
         }
 
 out:
@@ -1484,11 +1504,13 @@ out:
  **/
 static s32 e1000_check_reset_block_ich8lan(struct e1000_hw *hw)
 {
-        u32 fwsm;
+        bool blocked = false;
+        int i = 0;
 
-        fwsm = er32(FWSM);
-
-        return (fwsm & E1000_ICH_FWSM_RSPCIPHY) ? 0 : E1000_BLK_PHY_RESET;
+        while ((blocked = !(er32(FWSM) & E1000_ICH_FWSM_RSPCIPHY)) &&
+               (i++ < 10))
+                usleep_range(10000, 20000);
+        return blocked ? E1000_BLK_PHY_RESET : 0;
 }
 
 /**