staging: android: ion: Stop butchering the DMA address

{

	struct ion_buffer *buffer;

	struct sg_table *table;

	struct scatterlist *sg;

	int i, ret;

	int ret;

	buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);

	if (!buffer)

	INIT_LIST_HEAD(&buffer->vmas);

	INIT_LIST_HEAD(&buffer->attachments);

	mutex_init(&buffer->lock);

	/*

	 * this will set up dma addresses for the sglist -- it is not

	 * technically correct as per the dma api -- a specific

	 * device isn't really taking ownership here.  However, in practice on

	 * our systems the only dma_address space is physical addresses.

	 * Additionally, we can't afford the overhead of invalidating every

	 * allocation via dma_map_sg. The implicit contract here is that

	 * memory coming from the heaps is ready for dma, ie if it has a

	 * cached mapping that mapping has been invalidated

	 */

	for_each_sg(buffer->sg_table->sgl, sg, buffer->sg_table->nents, i) {

		sg_dma_address(sg) = sg_phys(sg);

		sg_dma_len(sg) = sg->length;

	}

	mutex_lock(&dev->buffer_lock);

	ion_buffer_add(dev, buffer);

	mutex_unlock(&dev->buffer_lock);