sfc: Fix ordering of device registration and initial netif_carrier_off()
We must call netif_carrier_off() after the device is registered, not
before, to set the operational state and user-space IFF_RUNNING flag
correctly.
Since we don't want observers to see an intermediate state, open-code
register_netdev() and add efx_update_name() and netif_carrier_off()
into the locked region.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/sfc/efx.c b/drivers/net/sfc/efx.c
index 343e8da..d4dc920 100644
--- a/drivers/net/sfc/efx.c
+++ b/drivers/net/sfc/efx.c
@@ -1614,21 +1614,24 @@
SET_NETDEV_DEV(net_dev, &efx->pci_dev->dev);
SET_ETHTOOL_OPS(net_dev, &efx_ethtool_ops);
- /* Always start with carrier off; PHY events will detect the link */
- netif_carrier_off(efx->net_dev);
-
/* Clear MAC statistics */
efx->mac_op->update_stats(efx);
memset(&efx->mac_stats, 0, sizeof(efx->mac_stats));
- rc = register_netdev(net_dev);
- if (rc) {
- EFX_ERR(efx, "could not register net dev\n");
- return rc;
- }
-
rtnl_lock();
+
+ rc = dev_alloc_name(net_dev, net_dev->name);
+ if (rc < 0)
+ goto fail_locked;
efx_update_name(efx);
+
+ rc = register_netdevice(net_dev);
+ if (rc)
+ goto fail_locked;
+
+ /* Always start with carrier off; PHY events will detect the link */
+ netif_carrier_off(efx->net_dev);
+
rtnl_unlock();
rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type);
@@ -1639,6 +1642,11 @@
return 0;
+fail_locked:
+ rtnl_unlock();
+ EFX_ERR(efx, "could not register net dev\n");
+ return rc;
+
fail_registered:
unregister_netdev(net_dev);
return rc;