Messages in this thread | | | Subject | Re: [PATCH v2 7/7] iommu/vt-d: Remove lazy allocation of domains | From | James Sewart <> | Date | Fri, 22 Mar 2019 10:07:01 +0000 |
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Hey Jacob,
> On 14 Mar 2019, at 23:35, Jacob Pan <jacob.jun.pan@linux.intel.com> wrote: > > On Thu, 14 Mar 2019 11:59:36 +0000 > James Sewart <jamessewart@arista.com> wrote: > >> >> - domain = get_valid_domain_for_dev(dev); >> + domain = find_domain(dev); >> if (!domain) >> return DMA_MAPPING_ERROR; >> >> @@ -3914,7 +3624,7 @@ static int intel_map_sg(struct device *dev, >> struct scatterlist *sglist, int nele if (iommu_no_mapping(dev)) >> return intel_nontranslate_map_sg(dev, sglist, >> nelems, dir); >> - domain = get_valid_domain_for_dev(dev); >> + domain = find_domain(dev); > This patchset looks like a very good clean up, I am wondering why we > can't use the generic iommu_get_domain_for_dev() here, since VT-d has a > default DMA domain after your patch.
This should be possible, only downside is we get an iommu_domain from iommu_get_domain_for_dev and will have to check its not null before getting the dmar_domain from it. We will be able to remove find_domain though.
Cheers, James.
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