ixgbe: do not call check_link for ethtool in ixgbe_get_settings()

Orabug: 23177316

In ixgbe_get_settings() the link status and speed of the interface
are determined based on a read from the LINKS register via the call
to mac.ops.check.link(). This can cause issues where external drivers
may end up with unknown speed when calling ethtool_get_setings().

Instead of calling the mac.ops.check_link() we can report the speed
from the adapter structure which is populated by the driver.

Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
(cherry picked from commit 0e4d422f5f7249324ac8d1b8e12772e530787a66)
Signed-off-by: Brian Maly <brian.maly@oracle.com>

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
index f317f399da105e6d3822f9a02aa4e0cbe0594ad5..b9eec25cbe4b6aded82dc49b1893b30b39d26b5d 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
@@ -185,9 +185,7 @@ static int ixgbe_get_settings(struct net_device *netdev,
        struct ixgbe_adapter *adapter = netdev_priv(netdev);
        struct ixgbe_hw *hw = &adapter->hw;
        ixgbe_link_speed supported_link;
-       u32 link_speed = 0;
        bool autoneg = false;
-       bool link_up;
 
        hw->mac.ops.get_link_capabilities(hw, &supported_link, &autoneg);
 
@@ -313,9 +311,8 @@ static int ixgbe_get_settings(struct net_device *netdev,
                break;
        }
 
-       hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
-       if (link_up) {
-               switch (link_speed) {
+       if (netif_carrier_ok(netdev)) {
+               switch (adapter->link_speed) {
                case IXGBE_LINK_SPEED_10GB_FULL:
                        ethtool_cmd_speed_set(ecmd, SPEED_10000);
                        break;