Merge "mtd: msm_qpic_nand: Support for multi page read"

	struct mtd_oob_ops ops;

	ops.mode = MTD_OPS_AUTO_OOB;

	ops.len = len;

	ops.retlen = 0;

	ops.ooblen = 0;

	ops.datbuf = buf;

	ops.oobbuf = NULL;

	if (!(from & (mtd->writesize - 1)) && !(len % mtd->writesize))

		/* read pages on page boundary */

	if (!(from & (mtd->writesize - 1)) && !(len % mtd->writesize)) {

		/*

		 * Handle reading of large size read buffer in vmalloc

		 * address space that does not fit in an MMU page.

		 */

		if (!virt_addr_valid(buf) &&

		   ((unsigned long) buf & ~PAGE_MASK) + len > PAGE_SIZE) {

			ops.len = mtd->writesize;

			for (;;) {

				ops.datbuf = buf;

				ret = msm_nand_read_oob(mtd, from, &ops);

	else

		ret = msm_nand_read_partial_page(mtd, from, &ops);

				if (ret < 0)

					break;

				len -= mtd->writesize;

				*retlen += mtd->writesize;

				if (len == 0)

					break;

				buf += mtd->writesize;

				from += mtd->writesize;

			}

		} else {

			ops.len = len;

			ops.datbuf = buf;

			ret =  msm_nand_read_oob(mtd, from, &ops);

			*retlen = ops.retlen;

		}

	} else {

		ops.len = len;

		ops.datbuf = buf;

		ret = msm_nand_read_partial_page(mtd, from, &ops);

		*retlen = ops.retlen;

	}

	return ret;

}