'\" t
.\"     Title: rio_get_device
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: RapidIO driver interface
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "RIO_GET_DEVICE" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "RapidIO driver interface"
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.SH "NAME"
rio_get_device \- Begin or continue searching for a RIO device by vid/did
.SH "SYNOPSIS"
.HP \w'struct\ rio_dev\ *\ rio_get_device('u
.BI "struct rio_dev * rio_get_device(u16\ " "vid" ", u16\ " "did" ", struct\ rio_dev\ *\ " "from" ");"
.SH "ARGUMENTS"
.PP
\fIvid\fR
.RS 4
RIO vid to match or
\fBRIO_ANY_ID\fR
to match all vids
.RE
.PP
\fIdid\fR
.RS 4
RIO did to match or
\fBRIO_ANY_ID\fR
to match all dids
.RE
.PP
\fIfrom\fR
.RS 4
Previous RIO device found in search, or
\fBNULL\fR
for new search
.RE
.SH "DESCRIPTION"
.PP
Iterates through the list of known RIO devices\&. If a RIO device is found with a matching
\fIvid\fR
and
\fIdid\fR, the reference count to the device is incrememted and a pointer to its device structure is returned\&. Otherwise,
\fBNULL\fR
is returned\&. A new search is initiated by passing
\fBNULL\fR
to the
\fIfrom\fR
argument\&. Otherwise, if
\fIfrom\fR
is not
\fBNULL\fR, searches continue from next device on the global list\&. The reference count for
\fIfrom\fR
is always decremented if it is not
\fBNULL\fR\&.
.SH "AUTHOR"
.PP
\fBMatt Porter\fR <\&mporter@kernel.crashing.org\&>, <\&mporter@mvista.com\&>
.RS 4
Author.
.RE
.SH "COPYRIGHT"
.br