netdev - [PATCH 3/3] ixgbe: synchronize the link_speed and link

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Date:	Wed, 30 Dec 2015 17:16:35 +0800
From:	<zyjzyj2000@...il.com>
To:	<jeffrey.t.kirsher@...el.com>, <jesse.brandeburg@...el.com>,
	<shannon.nelson@...el.com>, <carolyn.wyborny@...el.com>,
	<donald.c.skidmore@...el.com>, <bruce.w.allan@...el.com>,
	<john.ronciak@...el.com>, <mitch.a.williams@...el.com>,
	<intel-wired-lan@...ts.osuosl.org>, <netdev@...r.kernel.org>,
	<e1000-devel@...ts.sourceforge.net>, <mark.d.rustad@...el.com>
CC:	<venkat.viswanathan@...driver.com>,
	<Boris.Shteinbock@...driver.com>, <Vincent.Bourg@...driver.com>
Subject: [PATCH 3/3] ixgbe: synchronize the link_speed and link_up of a slave interface

From: Zhu Yanjun <yanjun.zhu@...driver.com>

According to the suggestion from Rustad, Mark D, this behavior perhaps
is more related to the copper phy. But to make fiber phy more robust,
to all the interfaces as a slave interface, the link_speed and link_up
is synchronized.

Signed-off-by: Zhu Yanjun <yanjun.zhu@...driver.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c |    8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 1bb6056..ce47639 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -6441,10 +6441,12 @@ static void ixgbe_watchdog_link_is_up(struct ixgbe_adapter *adapter)
 	 * a bonding driver in 802.3ad mode. When X540 NIC acts as an
 	 * independent interface, it is not necessary to synchronize link_up
 	 * and link_speed.
-	 * In the end, not continue if (X540 NIC && SLAVE && link_speed UNKNOWN)
+	 * According to the suggestion from Rustad, Mark D, this behavior
+	 * perhaps is related to the copper phy. To make fiber phy more robust,
+	 * To all the interfaces as a slave, the link_speed is checked.
+	 * In the end, not continue if (SLAVE && link_speed UNKNOWN)
 	 */
-	if ((hw->mac.type == ixgbe_mac_X540) &&
-	    (netdev->flags & IFF_SLAVE))
+	if (netdev->flags & IFF_SLAVE)
 		if (link_speed == IXGBE_LINK_SPEED_UNKNOWN)
 			return;
 
-- 
1.7.9.5

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