igb: fix link down inital state

As reported by Andrew Lutomirski <amluto@gmail.com>

All the intel wired ethernet drivers were calling netif_carrier_off
and netif_stop_queue (or variants) before calling register_netdevice

This is incorrect behavior as was pointed out by davem, and causes
ifconfig and friends to report a strange state before first link
after the driver was loaded, since without a netif_carrier_off, the stack
assumes carrier_on, but before register_netdev, netlink messages are not
sent out telling link state.

This apparently confused *some* versions of networkmanager.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Reported-by: Andrew Lutomirski <amluto@gmail.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 4 deletions

diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index 08c801490c72..ceaa58554679 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -1442,15 +1442,14 @@ static int __devinit igb_probe(struct pci_dev *pdev,
          * driver. */
         igb_get_hw_control(adapter);
 
-        /* tell the stack to leave us alone until igb_open() is called */
-        netif_carrier_off(netdev);
-        netif_tx_stop_all_queues(netdev);
-
         strcpy(netdev->name, "eth%d");
         err = register_netdev(netdev);
         if (err)
                 goto err_register;
 
+        /* carrier off reporting is important to ethtool even BEFORE open */
+        netif_carrier_off(netdev);
+
 #ifdef CONFIG_IGB_DCA
         if (dca_add_requester(&pdev->dev) == 0) {
                 adapter->flags |= IGB_FLAG_DCA_ENABLED;
@@ -1699,6 +1698,8 @@ static int igb_open(struct net_device *netdev)
         if (test_bit(__IGB_TESTING, &adapter->state))
                 return -EBUSY;
 
+        netif_carrier_off(netdev);
+
         /* allocate transmit descriptors */
         err = igb_setup_all_tx_resources(adapter);
         if (err)