From 9642dbe73c8a3b55a812253fcb9add9eeed4ca81 Mon Sep 17 00:00:00 2001
From: Steven Miao <realmz6@gmail.com>
Date: Wed, 7 Nov 2012 13:27:56 +0800
Subject: [PATCH] serial: bfin-uart: avoid dead lock in rx irq handler in smp
 kernel

Disabing dma irq and lock bottom half in smp kernel doesn't ensure exclusive
uart access. Call spin_lock_irqsave() instead.

Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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