'\" t
.\"     Title: snd_ctl_find_id
.\"    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: Sound Devices
.\"    Source: Kernel Hackers Manual 3.16.56
.\"  Language: English
.\"
.TH "SND_CTL_FIND_ID" "9" "May 2018" "Kernel Hackers Manual 3\&.16\&" "Sound Devices"
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.SH "NAME"
snd_ctl_find_id \- find the control instance with the given id
.SH "SYNOPSIS"
.HP \w'struct\ snd_kcontrol\ *\ snd_ctl_find_id('u
.BI "struct snd_kcontrol * snd_ctl_find_id(struct\ snd_card\ *\ " "card" ", struct\ snd_ctl_elem_id\ *\ " "id" ");"
.SH "ARGUMENTS"
.PP
\fIcard\fR
.RS 4
the card instance
.RE
.PP
\fIid\fR
.RS 4
the id to search
.RE
.SH "DESCRIPTION"
.PP
Finds the control instance with the given id from the card\&.
.PP
The caller must down card\->controls_rwsem before calling this function (if the race condition can happen)\&.
.SH "RETURN"
.PP
The pointer of the instance if found, or
\fBNULL\fR
if not\&.
.SH "COPYRIGHT"
.br