[src/trunk]: src/sys/dev Only allow blocksizes greater or equal to the calcul...

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

details:   https://anonhg.NetBSD.org/src/rev/de3b2bf83126
branches:  trunk
changeset: 827524:de3b2bf83126
user:      nat <nat%NetBSD.org@localhost>
date:      Tue Oct 31 21:18:02 2017 +0000

description:
Only allow blocksizes greater or equal to the calculated one.

This should help applications as the blocksize obtained (AUDIO_SET/GETINFO)
will work without stutter.

Ok christos@.

diffstat:

 sys/dev/audio.c |  10 ++++------
 1 files changed, 4 insertions(+), 6 deletions(-)

diffs (32 lines):

diff -r 5ccca5f89f78 -r de3b2bf83126 sys/dev/audio.c
--- a/sys/dev/audio.c   Tue Oct 31 21:13:24 2017 +0000
+++ b/sys/dev/audio.c   Tue Oct 31 21:18:02 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: audio.c,v 1.420 2017/10/31 21:13:24 nat Exp $  */
+/*     $NetBSD: audio.c,v 1.421 2017/10/31 21:18:02 nat 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 1.420 2017/10/31 21:13:24 nat Exp $");
+__KERNEL_RCSID(0, "$NetBSD: audio.c,v 1.421 2017/10/31 21:18:02 nat Exp $");
 
 #ifdef _KERNEL_OPT
 #include "audio.h"
@@ -2689,11 +2689,9 @@
                mixcb->blksize = audio_calc_blksize(sc, parm);
                cb->blksize = audio_calc_blksize(sc, &cb->s.param);
        } else {
-               if (SPECIFIED(blksize))
+               cb->blksize = audio_calc_blksize(sc, &stream->param);
+               if (SPECIFIED(blksize) && blksize > cb->blksize)
                        cb->blksize = blksize;
-               else {
-                       cb->blksize = audio_calc_blksize(sc, &stream->param);
-               }
        }
 }