From: Russell King <rmk@dyn-67.arm.linux.org.uk>
Date: Thu, 8 Jun 2006 16:59:31 +0000 (+0100)
Subject: [ARM] Fix Neponset IRQ handling
X-Git-Tag: v2.6.17~21^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d782f33df706f1b8a4496b41fd7d339c6e23aa59;p=pandora-kernel.git

[ARM] Fix Neponset IRQ handling

While testing the genirq code on ARM, a condition was found whereby
the Neponset IRQ handler was being re-entered, causing the system
to deadlock.

Under the ARM IRQ code, this would not have been a visible problem
because the "simple" IRQ handling had no re-entrancy protection.

Resolve this by acknowledging the parent interrupt after we mask it
when we are going to handle one of our "special" level-based sources
(from ethernet or USAR chip.)

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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