From 2029e5643a3c4fdd4ad20169fb950cc16e023d0c Mon Sep 17 00:00:00 2001
From: Eric Miao <eric.y.miao@gmail.com>
Date: Tue, 2 Feb 2010 23:39:35 -0800
Subject: [PATCH] [ARM] mmp2: fix incorrect calling of chip->mask_ack() for 2nd
 level cascaded IRQs

The irq_chip is not yet registered, so no default irq_chip.mask_ack(),
which we have to handle it correctly manually here.

Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
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