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tracing: Have system enable return error if one of the events fail

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If one of the events within a system fails to enable when "1" is written
to the system "enable" file, it should return an error. Note, some events
may still be enabled, but the user should know that something did go wrong.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (Red Hat) 2016-11-28 13:54:57 -05:00 committed by Steven Rostedt
parent 1dd349ab74
commit 989a0a3d24
1 changed files with 11 additions and 2 deletions
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13
kernel/trace/trace_events.c
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@ -702,6 +702,7 @@ __ftrace_set_clr_event_nolock(struct trace_array *tr, const char *match,
struct trace_event_call *call;
const char *name;
int ret = -EINVAL;
int eret = 0;
list_for_each_entry(file, &tr->events, list) {
@ -725,9 +726,17 @@ __ftrace_set_clr_event_nolock(struct trace_array *tr, const char *match,
if (event && strcmp(event, name) != 0)
continue;
ftrace_event_enable_disable(file, set);
ret = ftrace_event_enable_disable(file, set);
ret = 0;
/*
* Save the first error and return that. Some events
* may still have been enabled, but let the user
* know that something went wrong.
*/
if (ret && !eret)
eret = ret;
ret = eret;
}
return ret;