From: Thomas Gleixner <tglx@linutronix.de>
Date: Mon, 7 Feb 2011 09:34:30 +0000 (+0100)
Subject: genirq: Mark polled irqs and defer the real handler
X-Git-Tag: v2.6.39-rc1~503^2~9^2~71
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fe200ae48ef5c79bf7941fe8046ff9505c570ff6;p=pandora-kernel.git

genirq: Mark polled irqs and defer the real handler

With the chip.end() function gone we might run into a situation where
a poll call runs and the real interrupt comes in, sees IRQ_INPROGRESS
and disables the line. That might be a perfect working one, which will
then be masked forever.

So mark them polled while the poll runs. When the real handler sees
IRQ_INPROGRESS it checks the poll flag and waits for the polling to
complete. Add the necessary amount of sanity checks to it to avoid
deadlocks.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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