linux-kernel - [PATCH] e1000e: bump up timeout to wait when ME un-configure ULP mode

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Message-Id: <20200323191639.48826-1-aaron.ma@canonical.com>
Date:   Tue, 24 Mar 2020 03:16:39 +0800
From:   Aaron Ma <aaron.ma@...onical.com>
To:     jeffrey.t.kirsher@...el.com, aaron.ma@...onical.com,
        davem@...emloft.net, intel-wired-lan@...ts.osuosl.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        sasha.neftin@...el.com
Subject: [PATCH] e1000e: bump up timeout to wait when ME un-configure ULP mode

ME takes 2+ seconds to un-configure ULP mode done after resume
from s2idle on some ThinkPad laptops.
Without enough wait, reset and re-init will fail with error.

Fixes: f15bb6dde738cc8fa0 ("e1000e: Add support for S0ix")
BugLink: https://bugs.launchpad.net/bugs/1865570
Signed-off-by: Aaron Ma <aaron.ma@...onical.com>
---
 drivers/net/ethernet/intel/e1000e/ich8lan.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/e1000e/ich8lan.c b/drivers/net/ethernet/intel/e1000e/ich8lan.c
index b4135c50e905..147b15a2f8b3 100644
--- a/drivers/net/ethernet/intel/e1000e/ich8lan.c
+++ b/drivers/net/ethernet/intel/e1000e/ich8lan.c
@@ -1240,9 +1240,9 @@ static s32 e1000_disable_ulp_lpt_lp(struct e1000_hw *hw, bool force)
 			ew32(H2ME, mac_reg);
 		}
 
-		/* Poll up to 300msec for ME to clear ULP_CFG_DONE. */
+		/* Poll up to 2.5sec for ME to clear ULP_CFG_DONE. */
 		while (er32(FWSM) & E1000_FWSM_ULP_CFG_DONE) {
-			if (i++ == 30) {
+			if (i++ == 250) {
 				ret_val = -E1000_ERR_PHY;
 				goto out;
 			}
-- 
2.17.1