Re: [Xen-devel] [PATCH v2 05/11] vt-d: propagate IOMMU Device-TLB flush error up to IOMMU unmapping.

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 18.04.16 at 16:00, <quan.xu@xxxxxxxxx> wrote:
> --- a/xen/drivers/passthrough/vtd/iommu.c
> +++ b/xen/drivers/passthrough/vtd/iommu.c
> @@ -617,11 +617,12 @@ static void intel_iommu_iotlb_flush_all(struct domain 
> *d)
>  }
>  
>  /* clear one page's page table */
> -static void dma_pte_clear_one(struct domain *domain, u64 addr)
> +static int dma_pte_clear_one(struct domain *domain, u64 addr)

This, at the latest in this series, is where __must_check should
come into play.

Jan


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