From ff10e13cd06f3dbe90e9fffc3c2dd2057a116e4b Mon Sep 17 00:00:00 2001 From: Carolyn Wyborny Date: Thu, 28 Oct 2010 00:59:53 +0000 Subject: e1000e: reset PHY after errors detected Some errors can be induced in the PHY via environmental testing (specifically extreme temperature changes and electro static discharge testing), and in the case of the PHY hanging due to this input, this detects the problem and resets to continue. This issue only applies to 82574 silicon. Signed-off-by: Jesse Brandeburg Signed-off-by: Carolyn Wyborny Tested-by: Emil Tantilov Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/e1000e/netdev.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'drivers/net/e1000e/netdev.c') diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c index ec8cf3f51423..35a9dd4353d7 100644 --- a/drivers/net/e1000e/netdev.c +++ b/drivers/net/e1000e/netdev.c @@ -4098,6 +4098,25 @@ static void e1000e_enable_receives(struct e1000_adapter *adapter) } } +static void e1000e_check_82574_phy_workaround(struct e1000_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + + /* + * With 82574 controllers, PHY needs to be checked periodically + * for hung state and reset, if two calls return true + */ + if (e1000_check_phy_82574(hw)) + adapter->phy_hang_count++; + else + adapter->phy_hang_count = 0; + + if (adapter->phy_hang_count > 1) { + adapter->phy_hang_count = 0; + schedule_work(&adapter->reset_task); + } +} + /** * e1000_watchdog - Timer Call-back * @data: pointer to adapter cast into an unsigned long @@ -4333,6 +4352,9 @@ link_up: if (e1000e_get_laa_state_82571(hw)) e1000e_rar_set(hw, adapter->hw.mac.addr, 0); + if (adapter->flags2 & FLAG2_CHECK_PHY_HANG) + e1000e_check_82574_phy_workaround(adapter); + /* Reset the timer */ if (!test_bit(__E1000_DOWN, &adapter->state)) mod_timer(&adapter->watchdog_timer, -- cgit v1.2.2