[Intel-wired-lan] [next PATCH S26 06/12] i40e: fix: do not sleep in netdev_ops

[Deepthi Kavalur]

From: Jesse Brandeburg <jesse.brandeburg at intel.com>

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.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg at intel.com>
Reviewed-by: Nelson, Shannon <shannon.nelson at intel.com>
Change-ID: Ibc68c835f5ffa8ffe0638ffe910a66fc5649a7f7
---
Testing-Hints:
Add and remove vlan, over and under bonding and teaming driver,
add and delete mac address, run debug kernel with lock validator.

 drivers/net/ethernet/intel/i40e/i40e_main.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 052314c..37d6979 100644
--- 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);
 }
 
 /**
-- 
2.1.0