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| author | Steven Rostedt (Red Hat) <rostedt@goodmis.org> | 2013-05-09 17:35:12 +0200 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2013-05-09 17:35:12 +0200 |
| commit | 7c088b5120ffef017e2ddc38f992277e96436ef6 (patch) | |
| tree | 9cfeea9e1adc62a0e0ee452bdcbb6fc748358b6d | |
| parent | tracing: Return error if register_ftrace_function_probe() fails for event_ena... (diff) | |
| download | linux-7c088b5120ffef017e2ddc38f992277e96436ef6.tar.xz linux-7c088b5120ffef017e2ddc38f992277e96436ef6.zip | |
ftrace: Have ftrace_regex_write() return either read or error
As ftrace_regex_write() reads the result of ftrace_process_regex()
which can sometimes return a positive number, only consider a
failure if the return is negative. Otherwise, it will skip possible
other registered probes and by returning a positive number that
wasn't read, it will confuse the user processes doing the writing.
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
| -rw-r--r-- | kernel/trace/ftrace.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 8a5c017bb50c..d85a0ad81a67 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -3276,7 +3276,7 @@ ftrace_regex_write(struct file *file, const char __user *ubuf, ret = ftrace_process_regex(iter->hash, parser->buffer, parser->idx, enable); trace_parser_clear(parser); - if (ret) + if (ret < 0) goto out_unlock; } |