[src/trunk]: src/sys/dev/ebus cs4231_ebus_round_blocksize: never return 0 as ...

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

details:   https://anonhg.NetBSD.org/src/rev/d3d6071e5f29
branches:  trunk
changeset: 350833:d3d6071e5f29
user:      martin <martin%NetBSD.org@localhost>
date:      Tue Jan 24 05:22:38 2017 +0000

description:
cs4231_ebus_round_blocksize: never return 0 as blocksize

diffstat:

 sys/dev/ebus/cs4231_ebus.c |  10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)

diffs (33 lines):

diff -r cd542800b611 -r d3d6071e5f29 sys/dev/ebus/cs4231_ebus.c
--- a/sys/dev/ebus/cs4231_ebus.c        Mon Jan 23 17:35:34 2017 +0000
+++ b/sys/dev/ebus/cs4231_ebus.c        Tue Jan 24 05:22:38 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: cs4231_ebus.c,v 1.35 2011/11/23 23:07:31 jmcneill Exp $ */
+/*     $NetBSD: cs4231_ebus.c,v 1.36 2017/01/24 05:22:38 martin Exp $ */
 
 /*
  * Copyright (c) 2002 Valeriy E. Ushakov
@@ -28,7 +28,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: cs4231_ebus.c,v 1.35 2011/11/23 23:07:31 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: cs4231_ebus.c,v 1.36 2017/01/24 05:22:38 martin Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_sparc_arch.h"
@@ -268,9 +268,13 @@
 cs4231_ebus_round_blocksize(void *addr, int blk, int mode,
                            const audio_params_t *param)
 {
+       int sz;
 
        /* we want to use DMA burst size of 16 words */
-       return blk & -64;
+       sz = blk & -64;
+       if (sz == 0)
+               sz = 64;        /* zero is not a good blocksize */
+       return sz;
 }