net/e1000/base: increase timeout for ME ULP exit

Due timing issues in WHL and since recovery by host is
not always supported, increased timeout for Manageability Engine(ME)
to finish Ultra Low Power(ULP) exit flow for Nahum before timer expiration.

Signed-off-by: Nir Efrati <nir.efrati@intel.com>
Signed-off-by: Guinan Sun <guinanx.sun@intel.com>
Reviewed-by: Wei Zhao <wei.zhao1@intel.com>

diff --git a/drivers/net/e1000/base/e1000_ich8lan.c b/drivers/net/e1000/base/e1000_ich8lan.c
index 1dc2955..b79e3ba 100644 (file)
--- a/drivers/net/e1000/base/e1000_ich8lan.c
+++ b/drivers/net/e1000/base/e1000_ich8lan.c
@@ -1268,6 +1268,7 @@ out:
 s32 e1000_disable_ulp_lpt_lp(struct e1000_hw *hw, bool force)
 {
        s32 ret_val = E1000_SUCCESS;
+       u8 ulp_exit_timeout = 30;
        u32 mac_reg;
        u16 phy_reg;
        int i = 0;
@@ -1289,10 +1290,12 @@ s32 e1000_disable_ulp_lpt_lp(struct e1000_hw *hw, bool force)
                        E1000_WRITE_REG(hw, E1000_H2ME, mac_reg);
                }
 
-               /* Poll up to 300msec for ME to clear ULP_CFG_DONE. */
+               if (hw->mac.type == e1000_pch_cnp)
+                       ulp_exit_timeout = 100;
+
                while (E1000_READ_REG(hw, E1000_FWSM) &
                       E1000_FWSM_ULP_CFG_DONE) {
-                       if (i++ == 30) {
+                       if (i++ == ulp_exit_timeout) {
                                ret_val = -E1000_ERR_PHY;
                                goto out;
                        }