Re: [PATCH 03/21] ARM: shmobile: don't call irqchip_initunconditionally

[Simon Horman]

On Tue, Apr 30, 2013 at 10:58:40AM +0900, Simon Horman wrote:
> On Mon, Apr 29, 2013 at 04:49:07PM +0200, Arnd Bergmann wrote:
> > On Friday 26 April 2013, Simon Horman wrote:
> > > > diff --git a/arch/arm/mach-shmobile/intc-r8a7740.c b/arch/arm/mach-shmobile/intc-r8a7740.c
> > > > index 8871f77..5dc57f1 100644
> > > > --- a/arch/arm/mach-shmobile/intc-r8a7740.c
> > > > +++ b/arch/arm/mach-shmobile/intc-r8a7740.c
> > > > @@ -53,14 +53,23 @@ static void __init r8a7740_init_irq_common(void)
> > > >  
> > > >  void __init r8a7740_init_irq_of(void)
> > > >  {
> > > > +     if (!IS_ENABLED(CONFIG_OF))
> > > > +             return;
> > > > +
> > > 
> > > In other parts of the shmobile I believe that such code is
> > > guarded by #ifdef CONFIG_OF and I believe not guarding this code in
> > > some way was an oversight.
> > > 
> > > The above change seems fine to me.
> > 
> > Ok. The change that broke the code is only present in linux-next from
> > one of your trees, but is not in arm-soc. Could you include the change
> > in your tree, either by folding into one of your patches or adapting
> > my patch appropriately?
> 
> Yes, or of course. I'll queue-up your patch with
> the second hunk (below) removed.
> 
> > > > +
> > > > +     gic_dist_base = ioremap_nocache(0xc2800000, 0x1000);
> > > > +     gic_cpu_base = ioremap_nocache(0xc2000000, 0x1000);
> > > >  
> > > >       /* initialize the Generic Interrupt Controller PL390 r0p0 */
> > > >       gic_init(0, 29, gic_dist_base, gic_cpu_base);
> > > 
> > > This one seems broken as the armadillo800eva board currently uses
> > > it to initialise GIC even if CONFIG_ATAGS is not defined.
> > > 
> > > I did test the above change on the armadillo800eva board
> > > with the above change and CONFIG_ATAGS disabled, the result was
> > > a boot failure. With the change reverted booting seems fine.
> > 
> > Yes, I see my mistake now. The second change was clearly wrong
> > as this function is also used for DT boards, not for ATAGS boards.
> > 
> > 	Arnd

I have queued-up the following in the soc-r8a7740 branch of the
renesas tree and will push it shortly. It should subsequently arrive
in linux-next.