iavf: Move netdev_update_features() into watchdog task

Remove netdev_update_features() from iavf_adminq_task(), as it can cause
deadlocks due to needing rtnl_lock. Instead use the
IAVF_FLAG_SETUP_NETDEV_FEATURES flag to indicate that netdev features need
to be updated in the watchdog task. iavf_set_vlan_offload_features()
and iavf_set_queue_vlan_tag_loc() can be called directly from
iavf_virtchnl_completion().

Suggested-by: Phani Burra <phani.r.burra@intel.com>
Signed-off-by: Marcin Szycik <marcin.szycik@linux.intel.com>
Reviewed-by: Alexander Lobakin <alexandr.lobakin@intel.com>
Tested-by: Marek Szlosek <marek.szlosek@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

diff --git a/drivers/net/ethernet/intel/iavf/iavf_main.c b/drivers/net/ethernet/intel/iavf/iavf_main.c
index 0aa32c1..de7112a 100644 (file)
--- a/drivers/net/ethernet/intel/iavf/iavf_main.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_main.c
@@ -2692,6 +2692,15 @@ static void iavf_watchdog_task(struct work_struct *work)
                goto restart_watchdog;
        }
 
+       if ((adapter->flags & IAVF_FLAG_SETUP_NETDEV_FEATURES) &&
+           adapter->netdev_registered &&
+           !test_bit(__IAVF_IN_REMOVE_TASK, &adapter->crit_section) &&
+           rtnl_trylock()) {
+               netdev_update_features(adapter->netdev);
+               rtnl_unlock();
+               adapter->flags &= ~IAVF_FLAG_SETUP_NETDEV_FEATURES;
+       }
+
        if (adapter->flags & IAVF_FLAG_PF_COMMS_FAILED)
                iavf_change_state(adapter, __IAVF_COMM_FAILED);
 
@@ -3233,24 +3242,6 @@ static void iavf_adminq_task(struct work_struct *work)
        } while (pending);
        mutex_unlock(&adapter->crit_lock);
 
-       if ((adapter->flags & IAVF_FLAG_SETUP_NETDEV_FEATURES)) {
-               if (adapter->netdev_registered ||
-                   !test_bit(__IAVF_IN_REMOVE_TASK, &adapter->crit_section)) {
-                       struct net_device *netdev = adapter->netdev;
-
-                       rtnl_lock();
-                       netdev_update_features(netdev);
-                       rtnl_unlock();
-                       /* Request VLAN offload settings */
-                       if (VLAN_V2_ALLOWED(adapter))
-                               iavf_set_vlan_offload_features
-                                       (adapter, 0, netdev->features);
-
-                       iavf_set_queue_vlan_tag_loc(adapter);
-               }
-
-               adapter->flags &= ~IAVF_FLAG_SETUP_NETDEV_FEATURES;
-       }
        if ((adapter->flags &
             (IAVF_FLAG_RESET_PENDING | IAVF_FLAG_RESET_NEEDED)) ||
            adapter->state == __IAVF_RESETTING)

diff --git a/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c b/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c
index 0752fd6..365ca0c 100644 (file)
--- a/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c
@@ -2226,6 +2226,14 @@ void iavf_virtchnl_completion(struct iavf_adapter *adapter,
 
                iavf_process_config(adapter);
                adapter->flags |= IAVF_FLAG_SETUP_NETDEV_FEATURES;
+
+               /* Request VLAN offload settings */
+               if (VLAN_V2_ALLOWED(adapter))
+                       iavf_set_vlan_offload_features(adapter, 0,
+                                                      netdev->features);
+
+               iavf_set_queue_vlan_tag_loc(adapter);
+
                was_mac_changed = !ether_addr_equal(netdev->dev_addr,
                                                    adapter->hw.mac.addr);