linux-kernel - [tip:perf/core] tools lib traceevent: Fix %pM print format arg handling

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Date:	Fri, 6 Jul 2012 04:10:54 -0700
From:	tip-bot for Steven Rostedt <srostedt@...hat.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	rostedt@...dmis.org, srostedt@...hat.com, johannes.berg@...el.com,
	tglx@...utronix.de, namhyung@...nel.org
Subject: [tip:perf/core] tools lib traceevent:
  Fix %pM print format arg handling

Commit-ID:  aaf05c725bed1c7a8c940d9215662c78bea05dfd
Gitweb:     http://git.kernel.org/tip/aaf05c725bed1c7a8c940d9215662c78bea05dfd
Author:     Steven Rostedt <srostedt@...hat.com>
AuthorDate: Mon, 9 Jan 2012 15:58:09 -0500
Committer:  Namhyung Kim <namhyung@...nel.org>
CommitDate: Wed, 4 Jul 2012 13:40:30 +0900

tools lib traceevent: Fix %pM print format arg handling

When %pM is used, the arg value must be a 6 byte character that will
be printed as a 6 byte MAC address. But the code does a break over the
main code which updates the current processing arg to point to the
next arg. If there are other print arguments after a %pM, they will be
off by one. The next arg will still be processing the %pM arg.

Reported-by: Johannes Berg <johannes.berg@...el.com>
Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
Link: http://lkml.kernel.org/n/tip-q3g0n1espikynsdkpbi6ue6t@git.kernel.org
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/lib/traceevent/event-parse.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index 872dd35..da06c33 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -3858,6 +3858,7 @@ static void pretty_print(struct trace_seq *s, void *data, int size, struct event
 				} else if (*(ptr+1) == 'M' || *(ptr+1) == 'm') {
 					print_mac_arg(s, *(ptr+1), data, size, event, arg);
 					ptr++;
+					arg = arg->next;
 					break;
 				}
 
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