From: Anton Vorontsov <anton.vorontsov@linaro.org>
Date: Tue, 10 Jul 2012 00:10:39 +0000 (-0700)
Subject: tracing: Fix initialization failure path in tracing_set_tracer()
X-Git-Tag: v3.6-rc1~100^2~166
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b2ad368bebc0f772613668e893fa176396e9094c;p=pandora-kernel.git

tracing: Fix initialization failure path in tracing_set_tracer()

If tracer->init() fails, current code will leave current_tracer pointing
to an unusable tracer, which at best makes 'current_tracer' report
inaccurate value.

Fix the issue by pointing current_tracer to nop tracer, and only update
current_tracer with the new one after all the initialization succeeds.

Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

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