Re: [Xen-devel] [PATCH] xen/arm: domain_builder: irq sanity check logic fix

[Julien Grall <julien.grall@xxxxxxxxxx>]

Hi Stewart,

On 11/28/2017 02:42 PM, Stewart Hildebrand wrote:
> It's not possible for an irq to be both below 16 and greater/equal than 32.
> Also fix the reference to linux documentation while we're at it.
>
> Signed-off-by: Stewart Hildebrand <stewart.hildebrand@xxxxxxxxxxxxxxx>
Whoops. Well spotted!

Reviewed-by: Julien Grall <julien.grall@xxxxxxxxxx>

Also, I think it would be good to get the patch merge in Xen 4.10. It is 
boot code and low risk. So:
Release-acked-by: Julien Grall <julien.grall@xxxxxxxxxx>

Cheers,

> ---
>   xen/arch/arm/domain_build.c | 5 +++--
>   1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
> index c74f4dd..f50f8b9 100644
> --- a/xen/arch/arm/domain_build.c
> +++ b/xen/arch/arm/domain_build.c
> @@ -501,9 +501,10 @@ static void set_interrupt_ppi(gic_interrupt_t interrupt, 
> unsigned int irq,
>   {
>       __be32 *cells = interrupt;
>   
> -    BUG_ON(irq < 16 && irq >= 32);
> +    BUG_ON(irq < 16);
> +    BUG_ON(irq >= 32);
>   
> -    /* See linux Documentation/devictree/bindings/arm/gic.txt */
> +    /* See linux 
> Documentation/devicetree/bindings/interrupt-controller/arm,gic.txt */
>       dt_set_cell(&cells, 1, 1); /* is a PPI */
>       dt_set_cell(&cells, 1, irq - 16); /* PPIs start at 16 */
>       dt_set_cell(&cells, 1, (cpumask << 8) | level);
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