[PATCH 2/2] tracing: tprobe-events: Fix to put tracepoint_user when disable the tprobe

["Masami Hiramatsu (Google)" <mhiramat@kernel.org>]

From: Masami Hiramatsu (Google) <mhiramat@kernel.org>

__unregister_trace_fprobe() checks tf->tuser to put it when removing
tprobe. However, disable_trace_fprobe() does not use it and only calls
unregister_fprobe(). Thus it forgets to disable tracepoint_user.

If the trace_fprobe has tuser, put it for unregistering the tracepoint
callbacks when disabling tprobe correctly.

Fixes: 2867495dea86 ("tracing: tprobe-events: Register tracepoint when enable tprobe event")
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
---
 kernel/trace/trace_fprobe.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/kernel/trace/trace_fprobe.c b/kernel/trace/trace_fprobe.c
index d4e78d1ace12..62420eec677f 100644
--- a/kernel/trace/trace_fprobe.c
+++ b/kernel/trace/trace_fprobe.c
@@ -1512,6 +1512,10 @@ static int disable_trace_fprobe(struct trace_event_call *call,
 	if (!trace_probe_is_enabled(tp)) {
 		list_for_each_entry(tf, trace_probe_probe_list(tp), tp.list) {
 			unregister_fprobe(&tf->fp);
+			if (tf->tuser) {
+				tracepoint_user_put(tf->tuser);
+				tf->tuser = NULL;
+			}
 		}
 	}