From: Arnd Bergmann <arnd@arndb.de>
Date: Tue, 1 Jun 2010 20:53:02 +0000 (+0200)
Subject: tty: never hold BTM while getting tty_mutex
X-Git-Tag: v2.6.36-rc1~294^2~32
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=64ba3dc3143d94bbe935722aa17fa516b232bc83;p=pandora-kernel.git

tty: never hold BTM while getting tty_mutex

tty_mutex is never taken with the BTM held, except for
two corner cases that are worked around here.
We give up the BTM before calling tty_release() in the
error path of tty_open().
Similarly, we reorder the locking in ptmx_open()
to get tty_mutex before the BTM.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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