linux-kernel - Re: [PATCH 1/2] irqdomain: add empty irq_domain_check_msi

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Date:   Thu, 2 Mar 2017 11:24:34 +0100
From:   Auger Eric <eric.auger@...hat.com>
To:     Mian Yousaf Kaukab <yousaf.kaukab@...e.com>,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        marc.zyngier@....com, alex.williamson@...hat.com
Cc:     will.deacon@....com
Subject: Re: [PATCH 1/2] irqdomain: add empty irq_domain_check_msi_remap

Hi Mian Yousaf,

On 02/03/2017 11:01, Mian Yousaf Kaukab wrote:
> Fix following build error for s390:
> drivers/vfio/vfio_iommu_type1.c: In function 'vfio_iommu_type1_attach_group':
> drivers/vfio/vfio_iommu_type1.c:1290:25: error: implicit declaration of function 'irq_domain_check_msi_remap'
> 
> Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@...e.com>
> ---
>  include/linux/irqdomain.h | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
> index 188eced6813e..137817b08cdc 100644
> --- a/include/linux/irqdomain.h
> +++ b/include/linux/irqdomain.h
> @@ -524,6 +524,10 @@ static inline struct irq_domain *irq_find_matching_fwnode(
>  {
>  	return NULL;
>  }
> +static inline bool irq_domain_check_msi_remap(void)
> +{
> +	return true;
By default you should rather return false, reporting there is no MSI
remapping capability on irq domain side. Besides thank you for the fix.

Best Regards

Eric
> +}
>  #endif /* !CONFIG_IRQ_DOMAIN */
>  
>  #endif /* _LINUX_IRQDOMAIN_H */
>