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tracing/ftrace: add missing unlock in register_stat_tracer()

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We should unlock all_stat_sessions_mutex before returning failure.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Li Zefan
2009-01-15 09:30:52 +08:00
committed by Ingo Molnar
parent 4a2b8dda3f
commit 42fab4b2cd
1 changed files with 3 additions and 1 deletions
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4
kernel/trace/trace_stat.c
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@@ -73,8 +73,10 @@ int register_stat_tracer(struct tracer_stat *trace)
/* Already registered? */ /* Already registered? */
mutex_lock(&all_stat_sessions_mutex); mutex_lock(&all_stat_sessions_mutex);
list_for_each_entry_safe(node, tmp, &all_stat_sessions, session_list) { list_for_each_entry_safe(node, tmp, &all_stat_sessions, session_list) {
if (node->ts == trace) if (node->ts == trace) {
mutex_unlock(&all_stat_sessions_mutex);
return -EINVAL; return -EINVAL;
}
} }
mutex_unlock(&all_stat_sessions_mutex); mutex_unlock(&all_stat_sessions_mutex);