igb: fix null pointer dereference seen with fiber NICs

With a fiber or serdes NIC installed the driver was causing a null pointer
dereference on driver unload.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index f23a048..cfed2b0 100644 (file)
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -1372,7 +1372,8 @@ static void __devexit igb_remove(struct pci_dev *pdev)
 
        unregister_netdev(netdev);
 
-       if (!igb_check_reset_block(&adapter->hw))
+       if (adapter->hw.phy.ops.reset_phy &&
+           !igb_check_reset_block(&adapter->hw))
                adapter->hw.phy.ops.reset_phy(&adapter->hw);
 
        igb_remove_device(&adapter->hw);