netdev - [PATCH 1/2] atl1: fix resume

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Message-Id: <1284665387-10289-2-git-send-email-kronos.it@gmail.com>
Date:	Thu, 16 Sep 2010 21:29:46 +0200
From:	Luca Tettamanti <kronos.it@...il.com>
To:	netdev@...r.kernel.org
Cc:	Luca Tettamanti <kronos.it@...il.com>,
	atl1-devel@...ts.sourceforge.net, jcliburn@...il.com,
	chris.snook@...il.com, jie.yang@...eros.com, stable@...nel.org
Subject: [PATCH 1/2] 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@...nel.org
---
 drivers/net/atlx/atl1.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/atlx/atl1.c b/drivers/net/atlx/atl1.c
index 63b9ba0..bbd6e30 100644
--- a/drivers/net/atlx/atl1.c
+++ b/drivers/net/atlx/atl1.c
@@ -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;
-- 
1.7.1

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