From 7c088b5120ffef017e2ddc38f992277e96436ef6 Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Red Hat)" Date: Thu, 9 May 2013 11:35:12 -0400 Subject: 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 Signed-off-by: Steven Rostedt --- kernel/trace/ftrace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 8a5c017..d85a0ad 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; } -- cgit v1.1