netdev - [PATCH net-next v4 03/10] ixgbe: add rtnl locking in service task around vxlan_get_rx

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Date:	Sat,  9 Jan 2016 16:07:25 +0100
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	netdev@...r.kernel.org
Cc:	jesse@...nel.org, Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [PATCH net-next v4 03/10] ixgbe: add rtnl locking in service task around vxlan_get_rx_port

Protect IXGBE_FLAG2_VXLAN_REREG_NEEDED flag with rtnl_lock as it seems
it could be concurrently modified by ixgbe_set_features and
ixgbe_del_vxlan_port.

Cc: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Signed-off-by: Hannes Frederic Sowa <hannes@...essinduktion.org>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index c4003a88bbf6ea..85ec389bd46560 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -7118,10 +7118,12 @@ static void ixgbe_service_task(struct work_struct *work)
 		return;
 	}
 #ifdef CONFIG_IXGBE_VXLAN
+	rtnl_lock();
 	if (adapter->flags2 & IXGBE_FLAG2_VXLAN_REREG_NEEDED) {
 		adapter->flags2 &= ~IXGBE_FLAG2_VXLAN_REREG_NEEDED;
 		vxlan_get_rx_port(adapter->netdev);
 	}
+	rtnl_unlock();
 #endif /* CONFIG_IXGBE_VXLAN */
 	ixgbe_reset_subtask(adapter);
 	ixgbe_phy_interrupt_subtask(adapter);
-- 
2.5.0