'\" t
.\"     Title: WaitForDoorbellAck
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: May 2018
.\"    Manual: Message-based devices
.\"    Source: Kernel Hackers Manual 3.16.56
.\"  Language: English
.\"
.TH "WAITFORDOORBELLACK" "9" "May 2018" "Kernel Hackers Manual 3\&.16\&" "Message-based devices"
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.SH "NAME"
WaitForDoorbellAck \- Wait for IOC doorbell handshake acknowledge
.SH "SYNOPSIS"
.HP \w'int\ WaitForDoorbellAck('u
.BI "int WaitForDoorbellAck(MPT_ADAPTER\ *\ " "ioc" ", int\ " "howlong" ", int\ " "sleepFlag" ");"
.SH "ARGUMENTS"
.PP
\fIioc\fR
.RS 4
Pointer to MPT_ADAPTER structure
.RE
.PP
\fIhowlong\fR
.RS 4
How long to wait (in seconds)
.RE
.PP
\fIsleepFlag\fR
.RS 4
Specifies whether the process can sleep
.RE
.SH "DESCRIPTION"
.PP
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\&.
.PP
Returns a negative value on failure, else wait loop count\&.
.SH "COPYRIGHT"
.br