[PATCH] ARM: dts: imx6: RDU2: fix irq type for mv88e6xxx switch

[shawnguo@kernel.org (Shawn Guo)]

On Thu, Jul 19, 2018 at 10:53:58PM +0200, Andrew Lunn wrote:
> On Thu, Jul 19, 2018 at 09:38:23PM +0200, Uwe Kleine-K?nig wrote:
> > The Marvell switches report their interrupts in a level sensitive way.
> > When using edge sensitive detection a race condition in the interrupt
> > handler of the swich might result in the OS to miss all future events
> > which might make the switch non-functional.
> > 
> > The problem is that both mv88e6xxx_g2_irq_thread_fn() and
> > mv88e6xxx_g1_irq_thread_work() sample the irq cause register
> > (MV88E6XXX_G2_INT_SRC and MV88E6XXX_G1_STS respectively) once and then
> > handle the observed sources. If after sampling but before all observed
> > irq sources are handled a new irq source gets active this is not noticed
> > by the handler which returns unsuspecting, but the interrupt line stays
> > active which prevents the edge detector to kick in.
> > 
> > All device trees but imx6qdl-zii-rdu2 get this right (most of them by
> > not specifying an interrupt parent). So fix imx6qdl-zii-rdu2
> > accordingly.
> > 
> > Signed-off-by: Uwe Kleine-K?nig <u.kleine-koenig@pengutronix.de>
> 
> Reviewed-by: Andrew Lunn <andrew@lunn.ch>
> Fixes: f64992d1a916 ("ARM: dts: imx6: RDU2: Add Switch interrupts")

Applied with the Fixes tag added, thanks.