[PATCH 13/16] e1000/base: ability to force K1-off disabled

[Wenzhuo Lu <wenzhuo.lu@intel.com>]

MAC-PHY desync may occur causing misdetection of link up
event. Disabling K1-off feature can work around the problem.

Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
---
 drivers/net/e1000/base/e1000_hw.h      | 1 +
 drivers/net/e1000/base/e1000_ich8lan.c | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/drivers/net/e1000/base/e1000_hw.h b/drivers/net/e1000/base/e1000_hw.h
index 14e2e87..39a2a41 100644
--- a/drivers/net/e1000/base/e1000_hw.h
+++ b/drivers/net/e1000/base/e1000_hw.h
@@ -960,6 +960,7 @@ struct e1000_dev_spec_ich8lan {
 	E1000_MUTEX nvm_mutex;
 	E1000_MUTEX swflag_mutex;
 	bool nvm_k1_enabled;
+	bool disable_k1_off;
 	bool eee_disable;
 	u16 eee_lp_ability;
 #ifdef ULP_SUPPORT
diff --git a/drivers/net/e1000/base/e1000_ich8lan.c b/drivers/net/e1000/base/e1000_ich8lan.c
index 89265d2..92d92c8 100644
--- a/drivers/net/e1000/base/e1000_ich8lan.c
+++ b/drivers/net/e1000/base/e1000_ich8lan.c
@@ -1688,6 +1688,9 @@ STATIC s32 e1000_check_for_copper_link_ich8lan(struct e1000_hw *hw)
 				fextnvm6 &= ~E1000_FEXTNVM6_K1_OFF_ENABLE;
 		}
 
+		if (hw->dev_spec.ich8lan.disable_k1_off == true)
+			fextnvm6 &= ~E1000_FEXTNVM6_K1_OFF_ENABLE;
+
 		E1000_WRITE_REG(hw, E1000_FEXTNVM6, fextnvm6);
 	}
 
-- 
1.9.3