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tracing: Fix error handling to ensure instances can always be removed

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Remove debugfs directories for tracing instances during creation if an error
occurs causing the trace_array for that instance to not be added to
ftrace_trace_arrays. If the directory continues to exist after the error, it
cannot be removed because the respective trace_array is not in
ftrace_trace_arrays.

Link: http://lkml.kernel.org/r/1373502874-1706-2-git-send-email-azl@google.com

Cc: stable@vger.kernel.org # 3.10
Cc: Vaibhav Nagarnaik <vnagarnaik@google.com>
Cc: David Sharp <dhsharp@google.com>
Cc: Alexander Z Lam <lambchop468@gmail.com>
Signed-off-by: Alexander Z Lam <azl@google.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Alexander Z Lam 2013-07-10 17:34:34 -07:00 committed by Steven Rostedt
parent a232e270dc
commit 609e85a70b
1 changed files with 3 additions and 1 deletions
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4
kernel/trace/trace.c
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@ -5973,8 +5973,10 @@ static int new_instance_create(const char *name)
goto out_free_tr;
ret = event_trace_add_tracer(tr->dir, tr);
if (ret)
if (ret) {
debugfs_remove_recursive(tr->dir);
goto out_free_tr;
}
init_tracer_debugfs(tr, tr->dir);