ftrace: Have ftrace_regex_write() return either read or error

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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>

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Steven Rostedt (Red Hat) 2013-05-09 11:35:12 -04:00 • committed by Steven Rostedt

parent ff305ded9f

commit 7c088b5120

1 changed files with 1 additions and 1 deletions

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kernel/trace/ftrace.c

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