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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 <masami.hiramatsu.pt@hitachi.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: stable@kernel.org Link: http://lkml.kernel.org/r/20111004104504.14591.41266.stgit@fedora15 Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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1 changed files with 3 additions and 1 deletions
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@ -1956,8 +1956,10 @@ static int __del_trace_probe_event(int fd, struct str_node *ent)
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pr_debug("Writing event: %s\n", buf);
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ret = write(fd, buf, strlen(buf));
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if (ret < 0)
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if (ret < 0) {
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ret = -errno;
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goto error;
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}
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printf("Remove event: %s\n", ent->s);
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return 0;
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