Re: [PATCH 2/9] ARM: PXA: Kill use of irq_create_strict_mappings()

[Marc Zyngier]

Hi Guenter,

Thanks for the heads up.

On Mon, 26 Apr 2021 23:39:42 +0100,
Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
> 
> On Tue, Apr 06, 2021 at 10:35:50AM +0100, Marc Zyngier wrote:
> > irq_create_strict_mappings() is a poor way to allow the use of
> > a linear IRQ domain as a legacy one. Let's be upfront about
> > it and use a legacy domain when appropriate.
> > 
> > Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
> > ---
> 
> When running the "mainstone" qemu emulation, this patch results
> in many (32, actually) runtime warnings such as the following.
> 
> [    0.528272] ------------[ cut here ]------------
> [    0.528285] WARNING: CPU: 0 PID: 1 at kernel/irq/irqdomain.c:550 irq_domain_associate+0x194/0x1f0
> [    0.528315] error: virq335 is not allocated

[...]

This looks like a case of CONFIG_SPARSE_IRQ, combined with a lack of
brain engagement. I've come up with the following patch, which lets
the kernel boot in QEMU without screaming (other than the lack of a
rootfs...).

Please let me know if this helps.

Thanks,

	M.