[src/trunk]: src/sys/arch/arm/arm32 Also return early from _bus_dmamap_sync i...

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

details:   https://anonhg.NetBSD.org/src/rev/ce018a628a84
branches:  trunk
changeset: 818892:ce018a628a84
user:      skrll <skrll%NetBSD.org@localhost>
date:      Sat Nov 05 14:26:23 2016 +0000

description:
Also return early from _bus_dmamap_sync if we're not bouncing and there
are no {pre,post} ops

Now the KASSERT doesn't fire on cats

diffstat:

 sys/arch/arm/arm32/bus_dma.c |  14 +++++++++-----
 1 files changed, 9 insertions(+), 5 deletions(-)

diffs (35 lines):

diff -r 3ab47816aa51 -r ce018a628a84 sys/arch/arm/arm32/bus_dma.c
--- a/sys/arch/arm/arm32/bus_dma.c      Sat Nov 05 02:59:22 2016 +0000
+++ b/sys/arch/arm/arm32/bus_dma.c      Sat Nov 05 14:26:23 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: bus_dma.c,v 1.95 2016/06/18 16:51:44 skrll Exp $       */
+/*     $NetBSD: bus_dma.c,v 1.96 2016/11/05 14:26:23 skrll Exp $       */
 
 /*-
  * Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc.
@@ -35,7 +35,7 @@
 #include "opt_arm_bus_space.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: bus_dma.c,v 1.95 2016/06/18 16:51:44 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: bus_dma.c,v 1.96 2016/11/05 14:26:23 skrll Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -1086,9 +1086,13 @@
 #else
        const int post_ops = 0;
 #endif
-       if (!bouncing && pre_ops == 0 && post_ops == BUS_DMASYNC_POSTWRITE) {
-               STAT_INCR(sync_postwrite);
-               return;
+       if (!bouncing) {
+               if (pre_ops == 0 && post_ops == BUS_DMASYNC_POSTWRITE) {
+                       STAT_INCR(sync_postwrite);
+                       return;
+               } else if (pre_ops == 0 && post_ops == 0) {
+                       return;
+               }
        }
        KASSERTMSG(bouncing || pre_ops != 0 || (post_ops & BUS_DMASYNC_POSTREAD),
            "pre_ops %#x post_ops %#x", pre_ops, post_ops);