netdev - [net v2 5/6] e1000e: Fix check_for_link return value with autoneg off

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Message-Id: <20180305214030.25141-6-jeffrey.t.kirsher@intel.com>
Date:   Mon,  5 Mar 2018 13:40:29 -0800
From:   Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:     davem@...emloft.net
Cc:     Benjamin Poirier <bpoirier@...e.com>, netdev@...r.kernel.org,
        nhorman@...hat.com, sassmann@...hat.com, jogreene@...hat.com,
        stable <stable@...r.kernel.org>,
        Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net v2 5/6] e1000e: Fix check_for_link return value with autoneg off

From: Benjamin Poirier <bpoirier@...e.com>

When autoneg is off, the .check_for_link callback functions clear the
get_link_status flag and systematically return a "pseudo-error". This means
that the link is not detected as up until the next execution of the
e1000_watchdog_task() 2 seconds later.

CC: stable <stable@...r.kernel.org>
Fixes: 19110cfbb34d ("e1000e: Separate signaling for link check/link up")
Signed-off-by: Benjamin Poirier <bpoirier@...e.com>
Acked-by: Sasha Neftin <sasha.neftin@...el.com>
Tested-by: Aaron Brown <aaron.f.brown@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
 drivers/net/ethernet/intel/e1000e/ich8lan.c | 2 +-
 drivers/net/ethernet/intel/e1000e/mac.c     | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/e1000e/ich8lan.c b/drivers/net/ethernet/intel/e1000e/ich8lan.c
index 31277d3bb7dc..ff308b05d68c 100644
--- a/drivers/net/ethernet/intel/e1000e/ich8lan.c
+++ b/drivers/net/ethernet/intel/e1000e/ich8lan.c
@@ -1602,7 +1602,7 @@ static s32 e1000_check_for_copper_link_ich8lan(struct e1000_hw *hw)
 	 * we have already determined whether we have link or not.
 	 */
 	if (!mac->autoneg)
-		return -E1000_ERR_CONFIG;
+		return 1;
 
 	/* Auto-Neg is enabled.  Auto Speed Detection takes care
 	 * of MAC speed/duplex configuration.  So we only need to
diff --git a/drivers/net/ethernet/intel/e1000e/mac.c b/drivers/net/ethernet/intel/e1000e/mac.c
index f457c5703d0c..db735644b312 100644
--- a/drivers/net/ethernet/intel/e1000e/mac.c
+++ b/drivers/net/ethernet/intel/e1000e/mac.c
@@ -450,7 +450,7 @@ s32 e1000e_check_for_copper_link(struct e1000_hw *hw)
 	 * we have already determined whether we have link or not.
 	 */
 	if (!mac->autoneg)
-		return -E1000_ERR_CONFIG;
+		return 1;
 
 	/* Auto-Neg is enabled.  Auto Speed Detection takes care
 	 * of MAC speed/duplex configuration.  So we only need to
-- 
2.14.3