linux-kernel - [tip:tracing/syscalls] tracing/core: fix missing mutex unlock on tracing_set

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Message-ID: <tip-59f586db98919d7d9c43527b26c8de1cdf9ed912@git.kernel.org>
Date:	Mon, 16 Mar 2009 08:19:16 GMT
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	fweisbec@...il.com, tglx@...utronix.de, mingo@...e.hu
Subject: [tip:tracing/syscalls] tracing/core: fix missing mutex unlock on tracing_set_tracer()

Commit-ID:  59f586db98919d7d9c43527b26c8de1cdf9ed912
Gitweb:     http://git.kernel.org/tip/59f586db98919d7d9c43527b26c8de1cdf9ed912
Author:     Frederic Weisbecker <fweisbec@...il.com>
AuthorDate: Sun, 15 Mar 2009 22:10:39 +0100
Commit:     Ingo Molnar <mingo@...e.hu>
CommitDate: Mon, 16 Mar 2009 09:13:17 +0100

tracing/core: fix missing mutex unlock on tracing_set_tracer()

Impact: fix possible locking imbalance

In case of ring buffer resize failure, tracing_set_tracer forgot to
release trace_types_lock. Fix it.

Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
LKML-Reference: <1237151439-6755-5-git-send-email-fweisbec@...il.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 kernel/trace/trace.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index efe3202..c0cf946 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -2494,7 +2494,7 @@ static int tracing_set_tracer(const char *buf)
 	if (!ring_buffer_expanded) {
 		ret = tracing_resize_ring_buffer(trace_buf_size);
 		if (ret < 0)
-			return ret;
+			goto out;
 		ret = 0;
 	}
 
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