Sorry for the late patch here, but I hit the issue Baolu and Daniel pointed out could occur, and requires this fix (or iommu=nopt). Hoping to get it into an rc Jon Derrick (1): iommu/vt-d: use DMA domain for real DMA devices and subdevices drivers/iommu/intel-iommu.c | 56 ++++++++++++++++++++++++++++--------- 1 file changed, 43 insertions(+), 13 deletions(-) -- 2.18.1