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>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index be02045a5078..10b095d69b43 100644
--- 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);
 }