e1000e: check return of pci_save_state

Check return of pci_save_state and error out accordingly.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c
index ebbb9f0..ae6dce5 100644
--- a/drivers/net/e1000e/netdev.c
+++ b/drivers/net/e1000e/netdev.c
@@ -4802,7 +4802,10 @@
 		goto err_pci_reg;
 
 	pci_set_master(pdev);
-	pci_save_state(pdev);
+	/* PCI config space info */
+	err = pci_save_state(pdev);
+	if (err)
+		goto err_alloc_etherdev;
 
 	err = -ENOMEM;
 	netdev = alloc_etherdev(sizeof(struct e1000_adapter));