Re: [PATCH v2 1/1] serial: 8520_mtk: Prepare for platform_get_irq_optional() changes

From: Greg Kroah-Hartman
Date: Fri Mar 04 2022 - 13:48:59 EST


On Fri, Mar 04, 2022 at 08:11:10PM +0200, Andy Shevchenko wrote:
> On Fri, Dec 17, 2021 at 08:15:47PM +0200, Andy Shevchenko wrote:
> > The platform_get_irq_optional() is going to be changed in a way
> > that the result of it:
> > = 0 means no IRQ is provided
> > < 0 means the error which needs to be propagated to the upper layers
> > > 0 valid vIRQ is allocated
> >
> > In this case, drop check for 0. Note, the 0 is not valid vIRQ and
> > platform_get_irq_optional() issues a big WARN() in such case,
> >
> > It's safe to assume that 0 is not valid IRQ in this case since
> > the driver is only instantiated via Device Tree and corresponding
> > OF APIs should never ever return 0 for valid IRQ. Otherwise it is
> > a regression there.
>
> Can it be applied now?

What changed to make this viable?