linux-kernel - [PATCH v1] e1000e: honor pause autoneg flag

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Message-Id: <98ea4a6a8e42ffa454d5d42749262e8df02c0167.1405462125.git.decot@googlers.com>
Date:	Tue, 15 Jul 2014 15:09:06 -0700
From:	David Decotigny <decot@...glers.com>
To:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
	Jesse Brandeburg <jesse.brandeburg@...el.com>,
	Bruce Allan <bruce.w.allan@...el.com>,
	Carolyn Wyborny <carolyn.wyborny@...el.com>,
	Don Skidmore <donald.c.skidmore@...el.com>,
	Greg Rose <gregory.v.rose@...el.com>,
	Alex Duyck <alexander.h.duyck@...el.com>,
	John Ronciak <john.ronciak@...el.com>,
	Mitch Williams <mitch.a.williams@...el.com>,
	Linux NICS <linux.nics@...el.com>,
	e1000-devel@...ts.sourceforge.net, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc:	David Decotigny <decot@...glers.com>
Subject: [PATCH v1] e1000e: honor pause autoneg flag

Before:
  ifup eth0
  ethtool -A eth0 autoneg off rx on
  ethtool -a eth0  # rx on, as expected
  ifconfig eth0 up
  sleep 5
  ethtool -a eth0  # rx off, not expected

After:
  rx on with iface up, as expected

Signed-off-by: David Decotigny <decot@...glers.com>
---
 drivers/net/ethernet/intel/e1000e/mac.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/e1000e/mac.c b/drivers/net/ethernet/intel/e1000e/mac.c
index 8c386f3a..ef014ae 100644
--- a/drivers/net/ethernet/intel/e1000e/mac.c
+++ b/drivers/net/ethernet/intel/e1000e/mac.c
@@ -1048,7 +1048,8 @@ s32 e1000e_config_fc_after_link_up(struct e1000_hw *hw)
 	 * has completed, and if so, how the PHY and link partner has
 	 * flow control configured.
 	 */
-	if ((hw->phy.media_type == e1000_media_type_copper) && mac->autoneg) {
+	if ((hw->phy.media_type == e1000_media_type_copper) && mac->autoneg &&
+	    hw->adapter->fc_autoneg) {
 		/* Read the MII Status Register and check to see if AutoNeg
 		 * has completed.  We read this twice because this reg has
 		 * some "sticky" (latched) bits.
@@ -1191,7 +1192,7 @@ s32 e1000e_config_fc_after_link_up(struct e1000_hw *hw)
 	 * flow control configured.
 	 */
 	if ((hw->phy.media_type == e1000_media_type_internal_serdes) &&
-	    mac->autoneg) {
+	    mac->autoneg && hw->adapter->fc_autoneg) {
 		/* Read the PCS_LSTS and check to see if AutoNeg
 		 * has completed.
 		 */
-- 
2.0.0.526.g5318336

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