From: Borislav Petkov <petkovbb@googlemail.com>
Date: Wed, 30 Jul 2008 05:33:32 +0000 (-0700)
Subject: 8250.c: port.lock is irq-safe
X-Git-Tag: v2.6.27-rc2~183
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c389d27b5e643d745f55ffb939b1426060ba63d4;p=pandora-kernel.git

8250.c: port.lock is irq-safe

serial8250_startup() doesn't disable interrupts while taking the &up->port.lock
which might race against the interrupt handler serial8250_interrupt(), which
when entered, will deadlock waiting for the lock to be released.

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Tested-by: Ingo Molnar <mingo@elte.hu>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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