From: Pawel MOLL <pawel.moll@st.com>
Date: Mon, 1 Sep 2008 09:12:11 +0000 (+0100)
Subject: genirq: irq_chip->startup() usage in setup_irq and set_irq_chained handler
X-Git-Tag: v2.6.28-rc1~80^2~176
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7e6e178ab1548c8d894a77593e757acf4510b8ba;p=pandora-kernel.git

genirq: irq_chip->startup() usage in setup_irq and set_irq_chained handler

This patch clarifies usage of irq_chip->startup() callback:

1. The "if (startup) startup(); else enabled();" code in setup_irq()
   is unnecessary, as startup() falls back to enabled() via
   default callbacks, set by irq_chip_set_defaults().

2. When using set_irq_chained_handler() the startup() was never called,
   which is not good at all... Fixed. And again - when startup() is not
   defined the call will fall back to enable() than to unmask() via
   default callbacks.

Signed-off-by: Pawel Moll <pawel.moll@st.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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