usb_autopm_put_interface_async — decrement a USB interface's PM-usage counter
void usb_autopm_put_interface_async ( | struct usb_interface * intf); |
This routine does essentially the same thing as
usb_autopm_put_interface: it decrements intf's usage counter and
queues a delayed autosuspend request if the counter is <= 0. The
difference is that it does not acquire the device's pm_mutex;
callers must 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.