Re: [PATCH 5/5 v2] drivers/nvme: default to the IOMMU page size

Hi Nishanth, [auto build test results on v4.3-rc3 -- if it's inappropriate base, please ignore] config: sparc64-allyesconfig (attached as .config) reproduce: wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross chmod +x ~

[PATCH 5/5 v2] drivers/nvme: default to the IOMMU page size

We received a bug report recently when DDW (64-bit direct DMA on Power) is not enabled for NVMe devices. In that case, we fall back to 32-bit DMA via the IOMMU, which is always done via 4K TCEs (Translation Control Entries). The NVMe device driver, though, assumes that the DMA alignment for the PR