i40e: fix: do not sleep in netdev_ops

The driver was being called by VLAN, bonding, teaming operations
that expected to be able to hold locks like rcu_read_lock().

This causes the driver to be held to the requirement to not sleep,
and was found by the kernel debug options for checking sleep
inside critical section, and the locking validator.

Change-ID: Ibc68c835f5ffa8ffe0638ffe910a66fc5649a7f7
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Reviewed-by: Nelson, Shannon <shannon.nelson@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/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index fe67b90..ac89739 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -1542,7 +1542,11 @@ static int i40e_set_mac(struct net_device *netdev, void *p)
 
        ether_addr_copy(netdev->dev_addr, addr->sa_data);
 
-       return i40e_sync_vsi_filters(vsi);
+       /* schedule our worker thread which will take care of
+        * applying the new filter changes
+        */
+       i40e_service_event_schedule(vsi->back);
+       return 0;
 }
 
 /**
@@ -1766,6 +1770,11 @@ bottom_of_search_loop:
                vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
                vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
        }
+
+       /* schedule our worker thread which will take care of
+        * applying the new filter changes
+        */
+       i40e_service_event_schedule(vsi->back);
 }
 
 /**