From: Stefan Sørensen <stefan.sorensen@spectralink.com>
Date: Thu, 6 Mar 2014 15:27:15 +0000 (+0100)
Subject: ARM: OMAP2+: INTC: Acknowledge stuck active interrupts
X-Git-Tag: omap-for-v3.15/fixes-for-merge-window~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=698b48532539484b012fb7c4176b959d32a17d00;p=pandora-kernel.git

ARM: OMAP2+: INTC: Acknowledge stuck active interrupts

When an interrupt has become active on the INTC it will stay active
until it is acked, even if masked or de-asserted. The
INTC_PENDING_IRQn registers are however updated and since these are
used by omap_intc_handle_irq to determine which interrupt to handle,
it will never see the active interrupt. This will result in a storm of
useless interrupts that is only stopped when another higher priority
interrupt is asserted.

Fix by sending the INTC an acknowledge if we find no interrupts to
handle.

Cc: stable@vger.kernel.org
Signed-off-by: Stefan Sørensen <stefan.sorensen@spectralink.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
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