Subject: [PATCH v2 2/4] irqchip: sun4i: Fix irq 0 not working

From: [email-masked] (Maxime Ripard)
Date: Thu, 13 Mar 2014 10:29:17 +0100

On Wed, Mar 12, 2014 at 06:17:05PM +0100, Hans de Goede wrote:
> SUN4I_IRQ_VECTOR_REG containing 0 can mean one of 3 things:
> 1) no more irqs pending
> 2) irq 0 pending
> 3) spurious irq
> 
> So if we immediately get a reading of 0, check the irq-pending reg
> to differentiate between 2 and 3. We only do this once to avoid
> the extra check in the common case of 1) hapening after having
> read the vector-reg once.
> 
> Signed-off-by: Hans de Goede <[email-masked]>

Acked-by: Maxime Ripard <[email-masked]>

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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