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Date: Thu, 7 Oct 2010 18:55:15 +1000
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Subject: "do_IRQ: 0.89 No irq handler for vector (irq -1)"
From: Dave Airlie <airlied@gmail.com>
To: LKML <linux-kernel@vger.kernel.org>, Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@elte.hu>, Jesse Barnes <jbarnes@virtuousgeek.org>
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We are seeing this on both intel and radeon drivers when we reload the
module with 2.6.36-rc7 or so, and we get no irqs for that device.

you can reproduce by

init 3
echo 0 > /sys/class/vtconsole/vtcon1/bind
rmmod i915
modprobe i915

or radeon.

It seems to be possibly MSI related.

Dave.