#include <linux/usb.h>
#include "usb.h"
+#include "hcd.h"
static inline const char *plural(int n)
{
static int generic_suspend(struct usb_device *udev, pm_message_t msg)
{
- /* USB devices enter SUSPEND state through their hubs, but can be
- * marked for FREEZE as soon as their children are already idled.
- * But those semantics are useless, so we equate the two (sigh).
+ int rc;
+
+ /* Normal USB devices suspend through their upstream port.
+ * Root hubs don't have upstream ports to suspend,
+ * so we have to shut down their downstream HC-to-USB
+ * interfaces manually by doing a bus (or "global") suspend.
*/
- return usb_port_suspend(udev);
+ if (!udev->parent)
+ rc = hcd_bus_suspend(udev);
+ else
+ rc = usb_port_suspend(udev);
+ return rc;
}
static int generic_resume(struct usb_device *udev)
{
- return usb_port_resume(udev);
+ int rc;
+
+ /* Normal USB devices resume/reset through their upstream port.
+ * Root hubs don't have upstream ports to resume or reset,
+ * so we have to start up their downstream HC-to-USB
+ * interfaces manually by doing a bus (or "global") resume.
+ */
+ if (!udev->parent)
+ rc = hcd_bus_resume(udev);
+ else
+ rc = usb_port_resume(udev);
+ return rc;
}
#endif /* CONFIG_PM */