From: Gianluca Anzolin <gianluca@sottospazio.it>
Date: Mon, 29 Jul 2013 15:08:12 +0000 (+0200)
Subject: Bluetooth: Fix the reference counting of tty_port
X-Git-Tag: v3.12-rc1~132^2~84^2^2~54^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ece3150dea382c7c961fe2604332ed3474960d25;p=pandora-kernel.git

Bluetooth: Fix the reference counting of tty_port

The tty_port can be released in two cases: when we get a HUP in the
functions rfcomm_tty_hangup() and rfcomm_dev_state_change(). Or when the
user releases the device in rfcomm_release_dev().

In these cases we set the flag RFCOMM_TTY_RELEASED so that no other
function can get a reference to the tty_port.
The use of !test_and_set_bit(RFCOMM_TTY_RELEASED) ensures that the
'initial' tty_port reference is only dropped once.

The rfcomm_dev_del function is removed becase it isn't used anymore.

Signed-off-by: Gianluca Anzolin <gianluca@sottospazio.it>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
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