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igb: Fix possible panic caused by Rx traffic arrival while interface is down 

This patch reorders disabling napi and irqs during igb_down.
This is done to avoid possible panic's found in other Intel drivers
when Rx traffic arrives while interface is going down.

Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Carolyn Wyborny 2013-04-30 00:21:32 +00:00 committed by Jeff Kirsher
parent 2a0a0f1ea2
commit 41f149a285
1 changed files with 6 additions and 3 deletions
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9
drivers/net/ethernet/intel/igb/igb_main.c
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@ -1667,11 +1667,14 @@ void igb_down(struct igb_adapter *adapter)
wrfl();
msleep(10);
for (i = 0; i < adapter->num_q_vectors; i++)
napi_disable(&(adapter->q_vector[i]->napi));
igb_irq_disable(adapter);
for (i = 0; i < adapter->num_q_vectors; i++) {
napi_synchronize(&(adapter->q_vector[i]->napi));
napi_disable(&(adapter->q_vector[i]->napi));
}
del_timer_sync(&adapter->watchdog_timer);
del_timer_sync(&adapter->phy_info_timer);