[kbuild-all] Re: [PATCH v4 6/6] dma-iommu: Pass iova len for IOVA domain init

>> 7c1b058c8b5a31 Robin Murphy          2017-03-16  393      if (!dev) >>                                                              ^^^^ >> Old code has checks for NULL >> > > I doubt that in practice we need this check. > > Function iommu_dma_init_domain() is only called by > iommu_setup_dma_ops(). Furthermore, iommu_setup_dma_ops() calls > iommu_get_domain_for_dev(dev), which cannot safely handle dev == NULL > for when we call iommu_dma_init_domain() there. As such, the dev == > NULL checks in iommu_dma_init_domain() are effectively redundant. Indeed, I have a patch for that in the stack I'm preparing: https://gitlab.arm.com/linux-arm/linux-rm/-/commit/9b6cf2a214107c153ee278...