[src/trunk]: src/sys/dev/audio Fix a wrong calculation of recording ring buff...

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

details:   https://anonhg.NetBSD.org/src/rev/36c7aff4b4e7
branches:  trunk
changeset: 465114:36c7aff4b4e7
user:      isaki <isaki%NetBSD.org@localhost>
date:      Wed Nov 06 13:37:27 2019 +0000

description:
Fix a wrong calculation of recording ring buffer.  Reported on
http://mail-index.netbsd.org/current-users/2019/11/04/msg036976.html

diffstat:

 sys/dev/audio/audio.c |  6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diffs (27 lines):

diff -r dee0035029c1 -r 36c7aff4b4e7 sys/dev/audio/audio.c
--- a/sys/dev/audio/audio.c     Wed Nov 06 13:07:32 2019 +0000
+++ b/sys/dev/audio/audio.c     Wed Nov 06 13:37:27 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: audio.c,v 1.32 2019/10/18 04:09:02 msaitoh Exp $       */
+/*     $NetBSD: audio.c,v 1.33 2019/11/06 13:37:27 isaki Exp $ */
 
 /*-
  * Copyright (c) 2008 The NetBSD Foundation, Inc.
@@ -142,7 +142,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: audio.c,v 1.32 2019/10/18 04:09:02 msaitoh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: audio.c,v 1.33 2019/11/06 13:37:27 isaki Exp $");
 
 #ifdef _KERNEL_OPT
 #include "audio.h"
@@ -4510,7 +4510,7 @@
                int bytes1;
                int bytes2;
 
-               bytes1 = auring_get_contig_used(usrbuf);
+               bytes1 = auring_get_contig_free(usrbuf);
                KASSERT(bytes1 % framesize == 0);
                memcpy((uint8_t *)usrbuf->mem + auring_tail(usrbuf),
                    (uint8_t *)outbuf->mem + outbuf->head * framesize,