From: Li Zefan <lizf@cn.fujitsu.com>
Date: Tue, 21 Apr 2009 09:11:46 +0000 (+0800)
Subject: tracing/filters: don't remove old filters when failed to write subsys->filter
X-Git-Tag: v2.6.31-rc1~401^2~126
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e8082f3f5a17d7a7bfc7dd1050a3f958dc034e9a;p=pandora-kernel.git

tracing/filters: don't remove old filters when failed to write subsys->filter

If writing subsys->filter returns EINVAL or ENOSPC, the original
filters in subsys/ and subsys/events/ will be removed. This is
definitely wrong.

[ Impact: fix filter setting semantics on error condition ]

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <49ED8DD2.2070700@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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