diff options
| -rw-r--r-- | kernel/trace/trace_events.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c index 44ac83614c3d..87e826f1c237 100644 --- a/kernel/trace/trace_events.c +++ b/kernel/trace/trace_events.c @@ -2061,11 +2061,18 @@ event_enable_func(struct ftrace_hash *hash, if (ret < 0) goto out_put; ret = register_ftrace_function_probe(glob, ops, data); + /* + * The above returns on success the # of functions enabled, + * but if it didn't find any functions it returns zero. + * Consider no functions a failure too. + */ if (!ret) { ret = -ENOENT; goto out_disable; - } else - ret = 0; + } else if (ret < 0) + goto out_disable; + /* Just return zero, not the number of enabled functions */ + ret = 0; out: mutex_unlock(&event_mutex); return ret; |