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

[Maxime Ripard]

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 <hdegoede at redhat.com>

Acked-by: Maxime Ripard <maxime.ripard at free-electrons.com>

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 836 bytes
Desc: Digital signature
URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20140313/b1b0a8a0/attachment.sig>