[src/trunk]: src/sys/dev Fix return value. fo_kqfilter is expected to return...

[isaki <isaki%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/9bcdd5bebb96
branches:  trunk
changeset: 356933:9bcdd5bebb96
user:      isaki <isaki%NetBSD.org@localhost>
date:      Sat Oct 21 09:58:56 2017 +0000

description:
Fix return value.  fo_kqfilter is expected to return errno on error.
This is the rest of 1.226 (10 years ago).

diffstat:

 sys/dev/audio.c |  15 ++++++++-------
 1 files changed, 8 insertions(+), 7 deletions(-)

diffs (52 lines):

diff -r 1c31973cfb80 -r 9bcdd5bebb96 sys/dev/audio.c
--- a/sys/dev/audio.c   Sat Oct 21 09:12:40 2017 +0000
+++ b/sys/dev/audio.c   Sat Oct 21 09:58:56 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: audio.c,v 1.412 2017/10/21 09:12:40 isaki Exp $        */
+/*     $NetBSD: audio.c,v 1.413 2017/10/21 09:58:56 isaki Exp $        */
 
 /*-
  * Copyright (c) 2016 Nathanial Sloss <nathanialsloss%yahoo.com.au@localhost>
@@ -148,7 +148,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: audio.c,v 1.412 2017/10/21 09:12:40 isaki Exp $");
+__KERNEL_RCSID(0, "$NetBSD: audio.c,v 1.413 2017/10/21 09:58:56 isaki Exp $");
 
 #ifdef _KERNEL_OPT
 #include "audio.h"
@@ -1903,8 +1903,8 @@
 audiokqfilter(struct file *fp, struct knote *kn)
 {
        struct audio_softc *sc;
-       int rv;
        struct audio_chan *chan;
+       int error;
        dev_t dev;
 
        chan = fp->f_audioctx;
@@ -1922,18 +1922,19 @@
        switch (AUDIODEV(dev)) {
        case SOUND_DEVICE:
        case AUDIO_DEVICE:
-               rv = audio_kqfilter(chan, kn);
+               error = audio_kqfilter(chan, kn);
                break;
        case AUDIOCTL_DEVICE:
        case MIXER_DEVICE:
-               rv = 1;
+               error = ENODEV;
                break;
        default:
-               rv = 1;
+               error = ENXIO;
+               break;
        }
        mutex_exit(sc->sc_lock);
 
-       return rv;
+       return error;
 }
 
 static int