From: Steven Rostedt (Red Hat) <rostedt@goodmis.org>
Date: Thu, 9 May 2013 15:35:12 +0000 (-0400)
Subject: ftrace: Have ftrace_regex_write() return either read or error
X-Git-Tag: v3.10-rc1~1^2~14
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7c088b5120ffef017e2ddc38f992277e96436ef6;p=pandora-kernel.git

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>
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