Merge "Revert "msm: ion: Update the ion cache maintainance operations""

/* Copyright (c) 2011-2015, The Linux Foundation. All rights reserved.

/* Copyright (c) 2011-2014, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

			unsigned int cmd)

{

	struct sg_table *table = NULL;

	struct scatterlist *sg;

	struct page *page;

	int i;

	void *ptr;

	table = ion_sg_table(client, handle);

	if (IS_ERR_OR_NULL(table))

		return PTR_ERR(table);

	for_each_sg(table->sgl, sg, table->nents, i) {

		page = sg_page(sg);

		if (PageHighMem(page))

			ptr = kmap_atomic(page);

		else

			ptr = page_address(page);

	switch (cmd) {

	case ION_IOC_CLEAN_CACHES:

			dmac_clean_range(ptr, ptr + sg->length);

		if (!vaddr)

			dma_sync_sg_for_device(NULL, table->sgl,

				table->nents, DMA_TO_DEVICE);

		else

			dmac_clean_range(vaddr, vaddr + length);

		break;

	case ION_IOC_INV_CACHES:

			dmac_inv_range(ptr, ptr + sg->length);

		dma_sync_sg_for_cpu(NULL, table->sgl,

			table->nents, DMA_FROM_DEVICE);

		break;

	case ION_IOC_CLEAN_INV_CACHES:

			dmac_flush_range(ptr, ptr + sg->length);

		if (!vaddr) {

			dma_sync_sg_for_device(NULL, table->sgl,

				table->nents, DMA_TO_DEVICE);

			dma_sync_sg_for_cpu(NULL, table->sgl,

				table->nents, DMA_FROM_DEVICE);

		} else {

			dmac_flush_range(vaddr, vaddr + length);

		}

		break;

	default:

		return -EINVAL;

	}

		if (PageHighMem(page))

			kunmap_atomic(ptr);

	}

	return 0;

}