On Mon, 2016-04-18 at 21:19 +0200, Hannes Frederic Sowa wrote:
> vxlan_get_rx_port requires rtnl_lock to be held.
>
> Cc: Jeff Kirsher <jeffrey.t.kirs...@intel.com>
> Cc: Jesse Brandeburg <jesse.brandeb...@intel.com>
> Cc: Shannon Nelson <shannon.nel...@intel.com>
> Cc: Carolyn Wyborny <carolyn.wybo...@intel.com>
> Cc: Don Skidmore <donald.c.skidm...@intel.com>
> Cc: Bruce Allan <bruce.w.al...@intel.com>
> Cc: John Ronciak <john.ronc...@intel.com>
> Cc: Mitch Williams <mitch.a.willi...@intel.com>
> Signed-off-by: Hannes Frederic Sowa <han...@stressinduktion.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 2976df77bf14f5..b2f2cf40f06a87 100644
> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> @@ -7192,10 +7192,12 @@ 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);
Although there might be a deadlock with a concurrent
cancel_work_sync(&adapter->service_task); from ixgbe_remove()
