centos man page for parport_wait_event

PARPORT_WAIT_EVENT(9)					       Parallel Port Devices					     PARPORT_WAIT_EVENT(9)

NAME
       parport_wait_event - wait for an event on a parallel port

SYNOPSIS
       int parport_wait_event(struct parport * port, signed long timeout);

ARGUMENTS
       port
	   port to wait on

       timeout
	   time to wait (in jiffies)

DESCRIPTION
       This function waits for up to timeout jiffies for an interrupt to occur on a parallel port. If the port timeout is set to zero, it returns
       immediately.

       If an interrupt occurs before the timeout period elapses, this function returns zero immediately. If it times out, it returns one. An error
       code less than zero indicates an error (most likely a pending signal), and the calling code should finish what it's doing as soon as it
       can.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						     PARPORT_WAIT_EVENT(9)