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ixgbe: fix possible deadlock in ixgbe_service_task()

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ixgbe_service_task() calls unregister_netdev() under rtnl_lock().
But unregister_netdev() internally calls rtnl_lock().
So deadlock would occur.

Fixes: 59dd45d550 ("ixgbe: firmware recovery mode")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Taehee Yoo 2019-08-08 09:37:56 -07:00 committed by David S. Miller
parent 703acf6259
commit 8b6381600d
1 changed files with 1 additions and 4 deletions
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5
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
View file

@ -7897,11 +7897,8 @@ static void ixgbe_service_task(struct work_struct *work)
return;
}
if (ixgbe_check_fw_error(adapter)) {
if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
rtnl_lock();
if (!test_bit(__IXGBE_DOWN, &adapter->state))
unregister_netdev(adapter->netdev);
rtnl_unlock();
}
ixgbe_service_event_complete(adapter);
return;
}