From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Kirsher Subject: [net-next 04/10] ixgbe: fix link test when connected to 1Gbps link partner Date: Wed, 28 Aug 2013 03:33:42 -0700 Message-ID: <1377686028-30747-5-git-send-email-jeffrey.t.kirsher@intel.com> References: <1377686028-30747-1-git-send-email-jeffrey.t.kirsher@intel.com> Cc: Emil Tantilov , netdev@vger.kernel.org, gospo@redhat.com, sassmann@redhat.com, Jeff Kirsher To: davem@davemloft.net Return-path: Received: from mga09.intel.com ([134.134.136.24]:34607 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752762Ab3H1Kdz (ORCPT ); Wed, 28 Aug 2013 06:33:55 -0400 In-Reply-To: <1377686028-30747-1-git-send-email-jeffrey.t.kirsher@intel.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Emil Tantilov This patch is a partial reverse of: commit dfcc4615f09c33454bc553567f7c7506cae60cb9 Specifically forcing the laser before the link check can lead to inconsistent results because it does not guarantee that the link will be negotiated correctly. Such is the case when dual speed SFP+ module is connected to a gigabit link partner. Signed-off-by: Emil Tantilov Tested-by: Phil Schmitt Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c | 26 ++++++++---------------- 1 file changed, 9 insertions(+), 17 deletions(-) diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c index db0dbf6..57465d8 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c @@ -1885,11 +1885,11 @@ static void ixgbe_diag_test(struct net_device *netdev, struct ethtool_test *eth_test, u64 *data) { struct ixgbe_adapter *adapter = netdev_priv(netdev); - struct ixgbe_hw *hw = &adapter->hw; bool if_running = netif_running(netdev); set_bit(__IXGBE_TESTING, &adapter->state); if (eth_test->flags == ETH_TEST_FL_OFFLINE) { + struct ixgbe_hw *hw = &adapter->hw; if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) { int i; for (i = 0; i < adapter->num_vfs; i++) { @@ -1913,21 +1913,18 @@ static void ixgbe_diag_test(struct net_device *netdev, /* Offline tests */ e_info(hw, "offline testing starting\n"); - if (if_running) - /* indicate we're in test mode */ - dev_close(netdev); - - /* bringing adapter down disables SFP+ optics */ - if (hw->mac.ops.enable_tx_laser) - hw->mac.ops.enable_tx_laser(hw); - /* Link test performed before hardware reset so autoneg doesn't * interfere with test result */ if (ixgbe_link_test(adapter, &data[4])) eth_test->flags |= ETH_TEST_FL_FAILED; - ixgbe_reset(adapter); + if (if_running) + /* indicate we're in test mode */ + dev_close(netdev); + else + ixgbe_reset(adapter); + e_info(hw, "register testing starting\n"); if (ixgbe_reg_test(adapter, &data[0])) eth_test->flags |= ETH_TEST_FL_FAILED; @@ -1964,13 +1961,11 @@ skip_loopback: clear_bit(__IXGBE_TESTING, &adapter->state); if (if_running) dev_open(netdev); + else if (hw->mac.ops.disable_tx_laser) + hw->mac.ops.disable_tx_laser(hw); } else { e_info(hw, "online testing starting\n"); - /* if adapter is down, SFP+ optics will be disabled */ - if (!if_running && hw->mac.ops.enable_tx_laser) - hw->mac.ops.enable_tx_laser(hw); - /* Online tests */ if (ixgbe_link_test(adapter, &data[4])) eth_test->flags |= ETH_TEST_FL_FAILED; @@ -1984,9 +1979,6 @@ skip_loopback: clear_bit(__IXGBE_TESTING, &adapter->state); } - /* if adapter was down, ensure SFP+ optics are disabled again */ - if (!if_running && hw->mac.ops.disable_tx_laser) - hw->mac.ops.disable_tx_laser(hw); skip_ol_tests: msleep_interruptible(4 * 1000); } -- 1.8.3.1