From 1a821ca59593d307e564800c2f25ed1f9e1e2a6f Mon Sep 17 00:00:00 2001 From: Jesse Brandeburg Date: Wed, 16 Aug 2006 13:38:46 -0700 Subject: [PATCH] e1000: explicit locking for two ethtool path functions Explicitly lock two more ethtool entry points completely instead of the hardware reset only to prevent a race condition. Signed-off-by: Jesse Brandeburg Signed-off-by: Auke Kok --- drivers/net/e1000/e1000_ethtool.c | 33 +++++++++++++++++++++---------- 1 file changed, 23 insertions(+), 10 deletions(-) diff --git a/drivers/net/e1000/e1000_ethtool.c b/drivers/net/e1000/e1000_ethtool.c index 8edbc6b0b9c7..2baccf864328 100644 --- a/drivers/net/e1000/e1000_ethtool.c +++ b/drivers/net/e1000/e1000_ethtool.c @@ -183,6 +183,9 @@ e1000_set_settings(struct net_device *netdev, struct ethtool_cmd *ecmd) return -EINVAL; } + while (test_and_set_bit(__E1000_RESETTING, &adapter->flags)) + msleep(1); + if (ecmd->autoneg == AUTONEG_ENABLE) { hw->autoneg = 1; if (hw->media_type == e1000_media_type_fiber) @@ -199,16 +202,20 @@ e1000_set_settings(struct net_device *netdev, struct ethtool_cmd *ecmd) ADVERTISED_TP; ecmd->advertising = hw->autoneg_advertised; } else - if (e1000_set_spd_dplx(adapter, ecmd->speed + ecmd->duplex)) + if (e1000_set_spd_dplx(adapter, ecmd->speed + ecmd->duplex)) { + clear_bit(__E1000_RESETTING, &adapter->flags); return -EINVAL; + } /* reset the link */ - if (netif_running(adapter->netdev)) - e1000_reinit_locked(adapter); - else + if (netif_running(adapter->netdev)) { + e1000_down(adapter); + e1000_up(adapter); + } else e1000_reset(adapter); + clear_bit(__E1000_RESETTING, &adapter->flags); return 0; } @@ -238,9 +245,13 @@ e1000_set_pauseparam(struct net_device *netdev, { struct e1000_adapter *adapter = netdev_priv(netdev); struct e1000_hw *hw = &adapter->hw; + int retval = 0; adapter->fc_autoneg = pause->autoneg; + while (test_and_set_bit(__E1000_RESETTING, &adapter->flags)) + msleep(1); + if (pause->rx_pause && pause->tx_pause) hw->fc = e1000_fc_full; else if (pause->rx_pause && !pause->tx_pause) @@ -253,15 +264,17 @@ e1000_set_pauseparam(struct net_device *netdev, hw->original_fc = hw->fc; if (adapter->fc_autoneg == AUTONEG_ENABLE) { - if (netif_running(adapter->netdev)) - e1000_reinit_locked(adapter); - else + if (netif_running(adapter->netdev)) { + e1000_down(adapter); + e1000_up(adapter); + } else e1000_reset(adapter); } else - return ((hw->media_type == e1000_media_type_fiber) ? - e1000_setup_link(hw) : e1000_force_mac_fc(hw)); + retval = ((hw->media_type == e1000_media_type_fiber) ? + e1000_setup_link(hw) : e1000_force_mac_fc(hw)); - return 0; + clear_bit(__E1000_RESETTING, &adapter->flags); + return retval; } static uint32_t