From: Will Deacon <will.deacon@arm.com>
Date: Thu, 5 Apr 2012 18:42:10 +0000 (+0100)
Subject: ARM: 7377/1: vic: re-read status register before dispatching each IRQ handler
X-Git-Tag: v3.4-rc3~1^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=34af657916332e89564566bc8d35e3e06cc0c236;p=pandora-kernel.git

ARM: 7377/1: vic: re-read status register before dispatching each IRQ handler

handle_IRQ may briefly cause interrupts to be re-enabled during soft IRQ
processing on the exit path, leading to nested handling of VIC interrupts.

Since the current code does not re-read the VIC_IRQ_STATUS register, this
can lead to multiple invocations of the same interrupt handler and
spurious interrupts to be reported.

This patch changes the VIC interrupt dispatching code to re-read the
status register each time, avoiding duplicate invocations of the same
handler.

Acked-and-Tested-by: H Hartley Sweeten <hsweeten@visionengravers.com>

Reviewed-by: Jamie Iles <jamie@jamieiles.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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