+ * usb_autopm_put_interface_async - decrement a USB interface's PM-usage counter
+ * @intf: the usb_interface whose counter should be decremented
+ *
+ * This routine does much the same thing as usb_autopm_put_interface():
+ * It decrements @intf's usage counter and schedules a delayed
+ * autosuspend request if the counter is <= 0. The difference is that it
+ * does not perform any synchronization; callers should hold a private
+ * lock and handle all synchronization issues themselves.
+ *
+ * Typically a driver would call this routine during an URB's completion
+ * handler, if no more URBs were pending.
+ *
+ * This routine can run in atomic context.
+ */
+void usb_autopm_put_interface_async(struct usb_interface *intf)
+{
+ struct usb_device *udev = interface_to_usbdev(intf);
+ unsigned long last_busy;
+ int status = 0;
+
+ last_busy = udev->last_busy;
+ udev->last_busy = jiffies;
+ atomic_dec(&intf->pm_usage_cnt);
+ pm_runtime_put_noidle(&intf->dev);
+
+ if (!udev->autosuspend_disabled) {
+ /* Optimization: Don't schedule a delayed autosuspend if
+ * the timer is already running and the expiration time
+ * wouldn't change.
+ *
+ * We have to use the interface's timer. Attempts to
+ * schedule a suspend for the device would fail because
+ * the interface is still active.
+ */
+ if (intf->dev.power.timer_expires == 0 ||
+ round_jiffies_up(last_busy) !=
+ round_jiffies_up(jiffies)) {
+ status = pm_schedule_suspend(&intf->dev,
+ jiffies_to_msecs(
+ round_jiffies_up_relative(
+ udev->autosuspend_delay)));
+ }
+ }
+ dev_vdbg(&intf->dev, "%s: cnt %d -> %d\n",
+ __func__, atomic_read(&intf->dev.power.usage_count),
+ status);
+}
+EXPORT_SYMBOL_GPL(usb_autopm_put_interface_async);
+
+/**
+ * usb_autopm_put_interface_no_suspend - decrement a USB interface's PM-usage counter
+ * @intf: the usb_interface whose counter should be decremented
+ *
+ * This routine decrements @intf's usage counter but does not carry out an
+ * autosuspend.
+ *
+ * This routine can run in atomic context.
+ */
+void usb_autopm_put_interface_no_suspend(struct usb_interface *intf)
+{
+ struct usb_device *udev = interface_to_usbdev(intf);
+
+ udev->last_busy = jiffies;
+ atomic_dec(&intf->pm_usage_cnt);
+ pm_runtime_put_noidle(&intf->dev);
+}
+EXPORT_SYMBOL_GPL(usb_autopm_put_interface_no_suspend);
+
+/**