IOAT_TEST_SIZE
src = kzalloc(IOAT_TEST_SIZE, GFP_KERNEL);
dest = kzalloc(IOAT_TEST_SIZE, GFP_KERNEL);
for (i = 0; i < IOAT_TEST_SIZE; i++)
dma_src = dma_map_single(dev, src, IOAT_TEST_SIZE, DMA_TO_DEVICE);
dma_dest = dma_map_single(dev, dest, IOAT_TEST_SIZE, DMA_FROM_DEVICE);
dma_src, IOAT_TEST_SIZE,
if (memcmp(src, dest, IOAT_TEST_SIZE)) {
dma_unmap_single(dev, dma_dest, IOAT_TEST_SIZE, DMA_FROM_DEVICE);
dma_unmap_single(dev, dma_src, IOAT_TEST_SIZE, DMA_TO_DEVICE);