waitfordoorbellack(9) centos man page | unix.com

WAITFORDOORBELLACK(9)					       Message-based devices					     WAITFORDOORBELLACK(9)

NAME
       WaitForDoorbellAck - Wait for IOC doorbell handshake acknowledge

SYNOPSIS
       int WaitForDoorbellAck(MPT_ADAPTER * ioc, int howlong, int sleepFlag);

ARGUMENTS
       ioc
	   Pointer to MPT_ADAPTER structure

       howlong
	   How long to wait (in seconds)

       sleepFlag
	   Specifies whether the process can sleep

DESCRIPTION
       This routine waits (up to ~2 seconds max) for IOC doorbell handshake ACKnowledge, indicated by the IOP_DOORBELL_STATUS bit in its IntStatus
       register being clear.

       Returns a negative value on failure, else wait loop count.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						     WAITFORDOORBELLACK(9)