tracing/hist: Fix wrong return value in parse_action_params()

When number of synth fields is more than SYNTH_FIELDS_MAX,
parse_action_params() should return -EINVAL.

Link: https://lore.kernel.org/linux-trace-kernel/[email protected]

Cc: <[email protected]>
Cc: <[email protected]>
Cc: [email protected]
Fixes: c282a38 ("tracing: Add 'onmatch' hist trigger action support")
Signed-off-by: Zheng Yejian <[email protected]>
Signed-off-by: Steven Rostedt (Google) <[email protected]>

Author: Zheng Yejian

kernel/trace/trace_events_hist.c

@@ -3609,6 +3609,7 @@ static int parse_action_params(struct trace_array *tr, char *params,
 	while (params) {
 		if (data->n_params >= SYNTH_FIELDS_MAX) {
 			hist_err(tr, HIST_ERR_TOO_MANY_PARAMS, 0);
+			ret = -EINVAL;
 			goto out;
 		}