netdev - [PATCH net 3/4] iavf: schedule a request immediately after add/delete vlan

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Date: Fri, 15 Sep 2023 10:11:38 -0700
From: Tony Nguyen <anthony.l.nguyen@...el.com>
To: davem@...emloft.net,
	kuba@...nel.org,
	pabeni@...hat.com,
	edumazet@...gle.com,
	netdev@...r.kernel.org
Cc: Petr Oros <poros@...hat.com>,
	anthony.l.nguyen@...el.com,
	Michal Schmidt <mschmidt@...hat.com>,
	Ivan Vecera <ivecera@...hat.com>,
	Ahmed Zaki <ahmed.zaki@...el.com>,
	Simon Horman <horms@...nel.org>,
	Rafal Romanowski <rafal.romanowski@...el.com>
Subject: [PATCH net 3/4] iavf: schedule a request immediately after add/delete vlan

From: Petr Oros <poros@...hat.com>

When the iavf driver wants to reconfigure the VLAN filters
(iavf_add_vlan, iavf_del_vlan), it sets a flag in
aq_required:
  adapter->aq_required |= IAVF_FLAG_AQ_ADD_VLAN_FILTER;
or:
  adapter->aq_required |= IAVF_FLAG_AQ_DEL_VLAN_FILTER;

This is later processed by the watchdog_task, but it runs periodically
every 2 seconds, so it can be a long time before it processes the request.

In the worst case, the interface is unable to receive traffic for more
than 2 seconds for no objective reason.

Fixes: 5eae00c57f5e ("i40evf: main driver core")
Signed-off-by: Petr Oros <poros@...hat.com>
Co-developed-by: Michal Schmidt <mschmidt@...hat.com>
Signed-off-by: Michal Schmidt <mschmidt@...hat.com>
Co-developed-by: Ivan Vecera <ivecera@...hat.com>
Signed-off-by: Ivan Vecera <ivecera@...hat.com>
Reviewed-by: Ahmed Zaki <ahmed.zaki@...el.com>
Reviewed-by: Simon Horman <horms@...nel.org>
Tested-by: Rafal Romanowski <rafal.romanowski@...el.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
 drivers/net/ethernet/intel/iavf/iavf_main.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/iavf/iavf_main.c b/drivers/net/ethernet/intel/iavf/iavf_main.c
index 4b02a8cd77e9..6a2e6d64bc3a 100644
--- a/drivers/net/ethernet/intel/iavf/iavf_main.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_main.c
@@ -821,7 +821,7 @@ iavf_vlan_filter *iavf_add_vlan(struct iavf_adapter *adapter,
 		list_add_tail(&f->list, &adapter->vlan_filter_list);
 		f->state = IAVF_VLAN_ADD;
 		adapter->num_vlan_filters++;
-		adapter->aq_required |= IAVF_FLAG_AQ_ADD_VLAN_FILTER;
+		iavf_schedule_aq_request(adapter, IAVF_FLAG_AQ_ADD_VLAN_FILTER);
 	}
 
 clearout:
@@ -843,7 +843,7 @@ static void iavf_del_vlan(struct iavf_adapter *adapter, struct iavf_vlan vlan)
 	f = iavf_find_vlan(adapter, vlan);
 	if (f) {
 		f->state = IAVF_VLAN_REMOVE;
-		adapter->aq_required |= IAVF_FLAG_AQ_DEL_VLAN_FILTER;
+		iavf_schedule_aq_request(adapter, IAVF_FLAG_AQ_DEL_VLAN_FILTER);
 	}
 
 	spin_unlock_bh(&adapter->mac_vlan_list_lock);
-- 
2.38.1