[PATCH 4.4 124/268] e1000e: Fix check_for_link return value with autoneg off

[Greg Kroah-Hartman]

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Benjamin Poirier <bpoirier@xxxxxxxx>

[ Upstream commit 4e7dc08e57c95673d2edaba8983c3de4dd1f65f5 ]

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.

Fixes: 19110cfbb34d ("e1000e: Separate signaling for link check/link up")
Signed-off-by: Benjamin Poirier <bpoirier@xxxxxxxx>
Acked-by: Sasha Neftin <sasha.neftin@xxxxxxxxx>
Tested-by: Aaron Brown <aaron.f.brown@xxxxxxxxx>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@xxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/net/ethernet/intel/e1000e/ich8lan.c |    2 +-
 drivers/net/ethernet/intel/e1000e/mac.c     |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/net/ethernet/intel/e1000e/ich8lan.c
+++ b/drivers/net/ethernet/intel/e1000e/ich8lan.c
@@ -1574,7 +1574,7 @@ static s32 e1000_check_for_copper_link_i
 	 * 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
--- 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
 	 * 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