[PATCH V6 1/1] ixgbe: synchronize link_up and link_speed of a slave interface

From: <zyjzyj2000@gmail.com>
To: <jeffrey.t.kirsher@intel.com>, <jesse.brandeburg@intel.com>,
	<shannon.nelson@intel.com>, <carolyn.wyborny@intel.com>,
	<donald.c.skidmore@intel.com>, <bruce.w.allan@intel.com>,
	<john.ronciak@intel.com>, <mitch.a.williams@intel.com>,
	<intel-wired-lan@lists.osuosl.org>, <netdev@vger.kernel.org>,
	<e1000-devel@lists.sourceforge.net>, <mark.d.rustad@intel.com>
Cc: <venkat.viswanathan@windriver.com>,
	<Boris.Shteinbock@windriver.com>, <Vincent.Bourg@windriver.com>
Subject: [PATCH V6 1/1] ixgbe: synchronize link_up and link_speed of a slave interface
Date: Thu, 31 Dec 2015 15:11:39 +0800	[thread overview]
Message-ID: <1451545899-16584-2-git-send-email-zyjzyj2000@gmail.com> (raw)
In-Reply-To: <1451545899-16584-1-git-send-email-zyjzyj2000@gmail.com>

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

According to the suggestions from Rustad, Mark D, to all the slave 
interfaces, the link_speed and link_up should be synchronized since
the time span between link_up and link_speed will make some virtual
NICs not work well, such as a bonding driver in 802.3ad mode.

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

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index aed8d02..fc461b9 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -6426,6 +6426,11 @@ static void ixgbe_watchdog_link_is_up(struct ixgbe_adapter *adapter)
 	if (netif_carrier_ok(netdev))
 		return;
 
+	/* For all slave interfaces, wait for the link_speed to be known. */
+	if ((netdev->flags & IFF_SLAVE) &&
+	    (link_speed == IXGBE_LINK_SPEED_UNKNOWN))
+		return;
+
 	adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
 
 	switch (hw->mac.type) {
-- 
1.9.1
