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As we've dropped no-IOMMU support, there is no reason to specially handle the no-IOMMU case inside msm_iommu_new(). Make it return -ENODEV if there is no IOMMU (instead of returning NULL) and simplify all calling sites accordingly. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com> Patchwork: https://patchwork.freedesktop.org/patch/672561/ Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>