From: Steven Miao <realmz6@gmail.com>
Date: Wed, 7 Nov 2012 05:27:56 +0000 (+0800)
Subject: serial: bfin-uart: avoid dead lock in rx irq handler in smp kernel
X-Git-Tag: omap-for-v3.8/fixes-for-merge-window-v4-signed~83^2~68
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9642dbe73c8a3b55a812253fcb9add9eeed4ca81;p=pandora-kernel.git

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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