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atl1: fix resume 

adapter->cmb.cmb is initialized when the device is opened and freed when
it's closed. Accessing it unconditionally during resume results either
in a crash (NULL pointer dereference, when the interface has not been
opened yet) or data corruption (when the interface has been used and
brought down adapter->cmb.cmb points to a deallocated memory area).

Cc: stable@kernel.org
Signed-off-by: Luca Tettamanti <kronos.it@gmail.com>
Acked-by: Chris Snook <chris.snook@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Luca Tettamanti 2010-09-22 10:41:58 +00:00 committed by David S. Miller
parent 56b49f4b8f
commit ec5a32f67c
1 changed files with 3 additions and 2 deletions
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5
drivers/net/atlx/atl1.c
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@ -2847,10 +2847,11 @@ static int atl1_resume(struct pci_dev *pdev)
pci_enable_wake(pdev, PCI_D3cold, 0);
atl1_reset_hw(&adapter->hw);
adapter->cmb.cmb->int_stats = 0;
if (netif_running(netdev))
if (netif_running(netdev)) {
adapter->cmb.cmb->int_stats = 0;
atl1_up(adapter);
}
netif_device_attach(netdev);
return 0;