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authorMasami Hiramatsu <mhiramat@kernel.org>2018-10-21 18:08:20 +0300
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2018-10-28 11:58:15 +0300
commit18858511fd8a877303cc34c06efa461b26a0e070 (patch)
tree12f44dd2fc90a9bbdf54c6927245bdf8eb65414a /kernel
parentba0e41ca81b935b958006c7120466e2217357827 (diff)
downloadlinux-18858511fd8a877303cc34c06efa461b26a0e070.tar.xz
tracing: Return -ENOENT if there is no target synthetic event
Return -ENOENT error if there is no target synthetic event. This notices an operation failure to user as below; # echo 'wakeup_latency u64 lat; pid_t pid;' > synthetic_events # echo '!wakeup' >> synthetic_events sh: write error: No such file or directory Link: http://lkml.kernel.org/r/154013449986.25576.9487131386597290172.stgit@devbox Acked-by: Tom Zanussi <zanussi@linux.intel.com> Tested-by: Tom Zanussi <zanussi@linux.intel.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Rajvi Jingar <rajvi.jingar@intel.com> Cc: stable@vger.kernel.org Fixes: 4b147936fa50 ('tracing: Add support for 'synthetic' events') Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/trace/trace_events_hist.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index d239004aaf29..eb908ef2ecec 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -1063,8 +1063,10 @@ static int create_synth_event(int argc, char **argv)
event = NULL;
ret = -EEXIST;
goto out;
- } else if (delete_event)
+ } else if (delete_event) {
+ ret = -ENOENT;
goto out;
+ }
if (argc < 2) {
ret = -EINVAL;