igb: set num_rx/tx_queues to 0 when queues are freed

An issue was seen on suspend in which the system reported a page fault.  This
was due to the new reg_idx code being called after the queues were freed.

This update prevents any for loops from going through the queues by setting
the number of queues to 0 when they are freed.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index be02045a5078b70972b3bba5f7ccc59d346a7657..10b095d69b435b2c33702f5c998c1b11cfbf952f 100644 (file)
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -420,6 +420,9 @@ static void igb_free_queues(struct igb_adapter *adapter)
        for (i = 0; i < adapter->num_rx_queues; i++)
                netif_napi_del(&adapter->rx_ring[i].napi);
 
+       adapter->num_rx_queues = 0;
+       adapter->num_tx_queues = 0;
+
        kfree(adapter->tx_ring);
        kfree(adapter->rx_ring);
 }