ohci: avoid an unused variable warning

With CONFIG_PM, but without CONFIG_PM_SLEEP, the intention of the conditional in ohci_pci_start() doesn't work since device_may_wakeup() references pdev only with the latter config option.

 drivers/usb/host/ohci-pci.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

@@ -217,7 +217,7 @@ static int __devinit ohci_pci_start (str
 	struct ohci_hcd	*ohci = hcd_to_ohci (hcd);
 	int		ret;
 
-#ifdef CONFIG_PM /* avoid warnings about unused pdev */
+#ifdef CONFIG_PM_SLEEP /* avoid warnings about unused pdev */
 	if (hcd->self.controller) {
 		struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
 

Yuck. That means that runtime power management won't work correctly.

The same wakeup mechanisms that apply during SUSPEND and HIBERNATION are also used for runtime PM(*) ... which is allowed by CONFIG_PM, and which accordingly should not depend on PM_SLEEP.

I think the bug is that device_may_wakeup() now looks at CONFIG_PM_SLEEP instead of just CONFIG_PM.

- Dave

(*) Although ACPI has problems with the notion of runtime PM. For
example, it ignores PCI PME# signaling until PM_SLEEP transitions.