e1000e: Only run S0ix flows if shutdown succeeded

If the shutdown failed, the part will be thawed and running
S0ix flows will put it into an undefined state.
Reported-by: Alexander Duyck <alexander.duyck@gmail.com>
Reviewed-by: Alexander Duyck <alexander.duyck@gmail.com>
Signed-off-by: Mario Limonciello <mario.limonciello@dell.com>
Tested-by: Yijun Shen <Yijun.shen@dell.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

drivers/net/ethernet/intel/e1000e/netdev.c

@@ -6970,13 +6970,14 @@ static __maybe_unused int e1000e_pm_suspend(struct device *dev)
 	e1000e_pm_freeze(dev);
 
 	rc = __e1000_shutdown(pdev, false);
-	if (rc)
+	if (rc) {
 		e1000e_pm_thaw(dev);
-
+	} else {
 		/* Introduce S0ix implementation */
 		if (hw->mac.type >= e1000_pch_cnp &&
 		    !e1000e_check_me(hw->adapter->pdev->device))
 			e1000e_s0ix_entry_flow(adapter);
+	}
 
 	return rc;
 }