netdev - [PATCH 1/1] ixgbe: get link speed as a slave nic unrelated with link up

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Message-ID: <1454311675-24676-2-git-send-email-zyjzyj2000@gmail.com>
Date:	Mon, 1 Feb 2016 15:27:55 +0800
From:	<zyjzyj2000@...il.com>
To:	<zyjzyj2000@...il.com>, <emil.s.tantilov@...el.com>,
	<phillip.j.schmitt@...el.com>, <jeffrey.t.kirsher@...el.com>,
	<netdev@...r.kernel.org>, <e1000-devel@...ts.sourceforge.net>,
	<Boris.Shteinbock@...driver.com>
Subject: [PATCH 1/1] ixgbe: get link speed as a slave nic unrelated with link up

From: Zhu Yanjun <zyjzyj2000@...il.com>

The commit 0e4d422f5f72 ("ixgbe: do not call check_link for ethtool
in ixgbe_get_settings()") decreases the bonding failures. But the
following time slice still results in a bonding failure.

bonding                ixgbe
  |                     |
  |                    carrier_on
  |                     |
  |    <----------------|
 link_up                |
  |                     |
  |                    carrier_off
  |                     |
 get_link_speed ------->|
  |                     |

As such, the nic link speed can unconditionally be gotten as a
slave nic whether the link is up or not.

Signed-off-by: Zhu Yanjun <zyjzyj2000@...il.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
index bea96b3..53edf39 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
@@ -311,7 +311,7 @@ static int ixgbe_get_settings(struct net_device *netdev,
 		break;
 	}
 
-	if (netif_carrier_ok(netdev)) {
+	if (netif_carrier_ok(netdev) || (netdev->flags & IFF_SLAVE)) {
 		switch (adapter->link_speed) {
 		case IXGBE_LINK_SPEED_10GB_FULL:
 			ethtool_cmd_speed_set(ecmd, SPEED_10000);
-- 
1.7.9.5