tracing: initialize return value for __ftrace_set_clr_event

Commit 8f31bfe538ebafac187d2d4465a92e1d9ee6d8c2
tracing/events: clean up for ftrace_set_clr_event()

Moved out the code for ftrace_set_clr_event into a helper funciton but
did not initialize the return value. As a result, we do not warn about
a typo in the echoing of events in set_event.

This patch restores the old warning:

 # echo foobar > set_event
-bash: echo: write error: Invalid argument

[ Impact: restore warning of invalid entries to set_event ]

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index df394bc6d54b..2eecb87e42d3 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -118,7 +118,7 @@ static int __ftrace_set_clr_event(const char *match, const char *sub,
                                   const char *event, int set)
 {
         struct ftrace_event_call *call;
-        int ret;
+        int ret = -EINVAL;
 
         mutex_lock(&event_mutex);
         list_for_each_entry(call, &ftrace_events, list) {