perf probe: Fix to show correct error string

Fix perf probe to show correct error string when it fails to delete an event. The write(2) returns -1 if failed, and errno stores real error number. Signed-off-by: Masami Hiramatsu <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/20111004104504.14591.41266.stgit@fedora15 Signed-off-by: Steven Rostedt <[email protected]>
chrispat · Oct 10, 2011 · 44a5604 · 44a5604
1 parent 02ca152
commit 44a5604
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
@@ -1956,8 +1956,10 @@ static int __del_trace_probe_event(int fd, struct str_node *ent)
 
 	pr_debug("Writing event: %s\n", buf);
 	ret = write(fd, buf, strlen(buf));
-	if (ret < 0)
+	if (ret < 0) {
+		ret = -errno;
 		goto error;
+	}
 
 	printf("Remove event: %s\n", ent->s);
 	return 0;