From: Dean Jenkins <Dean_Jenkins@mentor.com>
Date: Thu, 28 Feb 2013 14:21:53 +0000 (+0000)
Subject: Bluetooth: Avoid rfcomm_session_timeout using freed session
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~65^2~170^2^2~116^2~53
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fea7b02fbf73adb2e746f00ed279a782de7e74e4;p=pandora-kernel.git

Bluetooth: Avoid rfcomm_session_timeout using freed session

Use del_timer_sync() instead of del_timer() as this ensures
that rfcomm_session_timeout() is not running on a different
CPU when rfcomm_session_put() is called. This avoids a race
condition on SMP systems because potentially
rfcomm_session_timeout() could reuse the freed RFCOMM session
structure caused by the execution of rfcomm_session_put().

Note that this modification makes the reason for the RFCOMM
session refcnt mechanism redundant.

Signed-off-by: Dean Jenkins <Dean_Jenkins@mentor.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
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