[src/trunk]: src/sys/arch/arm/arm Correct arm_cksumdata for <4 bytes of data

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

details:   https://anonhg.NetBSD.org/src/rev/25aa38ef417e
branches:  trunk
changeset: 336166:25aa38ef417e
user:      skrll <skrll%NetBSD.org@localhost>
date:      Sat Feb 14 23:12:29 2015 +0000

description:
Correct arm_cksumdata for <4 bytes of data

diffstat:

 sys/arch/arm/arm/cpu_in_cksum.S |  7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)

diffs (28 lines):

diff -r 8c293508fa14 -r 25aa38ef417e sys/arch/arm/arm/cpu_in_cksum.S
--- a/sys/arch/arm/arm/cpu_in_cksum.S   Sat Feb 14 22:40:18 2015 +0000
+++ b/sys/arch/arm/arm/cpu_in_cksum.S   Sat Feb 14 23:12:29 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: cpu_in_cksum.S,v 1.9 2015/01/06 16:24:58 christos Exp $        */
+/*     $NetBSD: cpu_in_cksum.S,v 1.10 2015/02/14 23:12:29 skrll Exp $  */
 
 /*
  * Copyright 2003 Wasabi Systems, Inc.
@@ -40,7 +40,7 @@
  */
 
 #include <machine/asm.h>
-RCSID("$NetBSD: cpu_in_cksum.S,v 1.9 2015/01/06 16:24:58 christos Exp $")
+RCSID("$NetBSD: cpu_in_cksum.S,v 1.10 2015/02/14 23:12:29 skrll Exp $")
        
 #include "assym.h"
 
@@ -191,8 +191,7 @@
        RETc(eq)                        /* done */
 #endif
        adds    r7, r7, r1              /* undo sub */
-       adds    r7, r7, r1              /* r7 = offset + len */
-       rsb     r7, r7, #4
+       subs    r7, r7, r1
        lsls    r7, r7, #3
 #if defined(__ARMEB__)
        lsrs    r2, r2, r7