Man page 9 : usb_autopm_put_interface_async

usb_autopm_put_interface_async - decrement a USB interfaceAqs PM-usage counter

void usb_autopm_put_interface_async(struct usb_interface *  intf );

intf
    the usb_interface whose counter should be decremented

This routine does much the same thing as usb_autopm_put_interface: It decrements intfAqs 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 URBAqs completion handler, if no more URBs were pending.

This routine can run in atomic context.