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authorBruce Allan <bruce.w.allan@intel.com>2009-11-20 23:23:34 +0000
committerDavid S. Miller <davem@davemloft.net>2009-11-21 11:33:52 -0800
commit7ea9655f8a4ccefcd8fdea7eb4fc5dab98e1a7ba (patch)
treee7334067ecf1177be7fcf125e787f04820ea7a81
parenta68ea775ad24ff403437c967628d2b9ce531ce48 (diff)
e1000e: link reporting problems
Copper links with WoL or management enabled (any condition which prevents the phy from being powered down when the interface is taken down) were always reporting link-up when the interface had been taken down. This is because when the interface is taken down (ifconfig ethx down), interrupts are disabled. With no interrupts, there is no LSC interrupt, which is normally required to set "get_link_status", which instructs the driver to query the device for link state. The fix is to force get_link_status to true if the interface is not up. Signed-off-by: Bruce Allan <bruce.w.allan@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/e1000e/ethtool.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/net/e1000e/ethtool.c b/drivers/net/e1000e/ethtool.c
index 3d73f2070b9..67e06fd9fc4 100644
--- a/drivers/net/e1000e/ethtool.c
+++ b/drivers/net/e1000e/ethtool.c
@@ -190,6 +190,17 @@ static int e1000_get_settings(struct net_device *netdev,
static u32 e1000_get_link(struct net_device *netdev)
{
struct e1000_adapter *adapter = netdev_priv(netdev);
+ struct e1000_mac_info *mac = &adapter->hw.mac;
+
+ /*
+ * If the link is not reported up to netdev, interrupts are disabled,
+ * and so the physical link state may have changed since we last
+ * looked. Set get_link_status to make sure that the true link
+ * state is interrogated, rather than pulling a cached and possibly
+ * stale link state from the driver.
+ */
+ if (!netif_carrier_ok(netdev))
+ mac->get_link_status = 1;
return e1000_has_link(adapter);
}