From: Magnus Damm <damm+renesas@xxxxxxxxxxxxx> The r8a7795 IPMMU supports 64-bit bus mastering. Both the coherent DMA mask and the streaming DMA mask are set to unlock the 64-bit address space for coherent allocations and streaming operations. Signed-off-by: Magnus Damm <damm+renesas@xxxxxxxxxxxxx> --- Changes since V1: - Updated the commit message drivers/iommu/ipmmu-vmsa.c | 1 + 1 file changed, 1 insertion(+) --- 0019/drivers/iommu/ipmmu-vmsa.c +++ work/drivers/iommu/ipmmu-vmsa.c 2016-06-06 11:01:28.730607110 +0900 @@ -1082,6 +1082,7 @@ static int ipmmu_probe(struct platform_d spin_lock_init(&mmu->lock); bitmap_zero(mmu->ctx, IPMMU_CTX_MAX); mmu->features = match->data; + dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); /* Map I/O memory and request IRQ. */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
