ice: avoid setting features during reset

Certain subsystems behave very badly when called during reset (core
dump). This patch returns -EBUSY when reconfiguring some subsystems
during reset. With this patch some ethtool functions will not core
dump during reset.

Signed-off-by: Henry Tieman <henry.w.tieman@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index d963aec..cb93fe5 100644 (file)
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -3776,6 +3776,7 @@ ice_set_features(struct net_device *netdev, netdev_features_t features)
 {
        struct ice_netdev_priv *np = netdev_priv(netdev);
        struct ice_vsi *vsi = np->vsi;
+       struct ice_pf *pf = vsi->back;
        int ret = 0;
 
        /* Don't set any netdev advanced features with device in Safe Mode */
@@ -3785,6 +3786,13 @@ ice_set_features(struct net_device *netdev, netdev_features_t features)
                return ret;
        }
 
+       /* Do not change setting during reset */
+       if (ice_is_reset_in_progress(pf->state)) {
+               dev_err(&vsi->back->pdev->dev,
+                       "Device is resetting, changing advanced netdev features temporarily unavailable.\n");
+               return -EBUSY;
+       }
+
        /* Multiple features can be changed in one call so keep features in
         * separate if/else statements to guarantee each feature is checked
         */