skge: crash on shutdown/suspend

If device is not fails during module startup (like unsupported chip
version) then driver would crash dereferencing a null pointer, on shutdown
or suspend/resume.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/net/skge.c b/drivers/net/skge.c
index e0489578945d..776692946562 100644
--- a/drivers/net/skge.c
+++ b/drivers/net/skge.c
@@ -3802,6 +3802,9 @@ static int skge_suspend(struct pci_dev *pdev, pm_message_t state)
         struct skge_hw *hw  = pci_get_drvdata(pdev);
         int i, err, wol = 0;
 
+        if (!hw)
+                return 0;
+
         err = pci_save_state(pdev);
         if (err)
                 return err;
@@ -3830,6 +3833,9 @@ static int skge_resume(struct pci_dev *pdev)
         struct skge_hw *hw  = pci_get_drvdata(pdev);
         int i, err;
 
+        if (!hw)
+                return 0;
+
         err = pci_set_power_state(pdev, PCI_D0);
         if (err)
                 goto out;
@@ -3868,6 +3874,9 @@ static void skge_shutdown(struct pci_dev *pdev)
         struct skge_hw *hw  = pci_get_drvdata(pdev);
         int i, wol = 0;
 
+        if (!hw)
+                return;
+
         for (i = 0; i < hw->ports; i++) {
                 struct net_device *dev = hw->dev[i];
                 struct skge_port *skge = netdev_priv(dev);