From: Peter Chubb <peterc@gelato.unsw.edu.au>
Date: Fri, 24 Mar 2006 05:39:47 +0000 (-0800)
Subject: [BRIDGE]: Unaligned accesses in the ethernet bridge
X-Git-Tag: v2.6.17-rc1~738^2~10
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4dc6d9cc38cea1004a7f827cf76409ae42231fee;p=linux-2.6

[BRIDGE]: Unaligned accesses in the ethernet bridge

I see lots of
	kernel unaligned access to 0xa0000001009dbb6f, ip=0xa000000100811591
	kernel unaligned access to 0xa0000001009dbb6b, ip=0xa0000001008115c1
	kernel unaligned access to 0xa0000001009dbb6d, ip=0xa0000001008115f1
messages in my logs on IA64 when using the ethernet bridge with 2.6.16.

Appended is a patch to fix them.

Signed-off-by: Peter Chubb <peterc@gelato.unsw.edu.au>
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/bridge/br_stp_bpdu.c b/net/bridge/br_stp_bpdu.c
index 8934a54792..a7ba0cce0b 100644
--- a/net/bridge/br_stp_bpdu.c
+++ b/net/bridge/br_stp_bpdu.c
@@ -19,6 +19,7 @@
 #include <linux/llc.h>
 #include <net/llc.h>
 #include <net/llc_pdu.h>
+#include <asm/unaligned.h>
 
 #include "br_private.h"
 #include "br_private_stp.h"
@@ -59,12 +60,12 @@ static inline void br_set_ticks(unsigned char *dest, int j)
 {
 	unsigned long ticks = (STP_HZ * j)/ HZ;
 
-	*((__be16 *) dest) = htons(ticks);
+	put_unaligned(htons(ticks), (__be16 *)dest);
 }
 
 static inline int br_get_ticks(const unsigned char *src)
 {
-	unsigned long ticks = ntohs(*(__be16 *)src);
+	unsigned long ticks = ntohs(get_unaligned((__be16 *)src));
 
 	return (ticks * HZ + STP_HZ - 1) / STP_HZ;
 }