tree 0d063673734ad1c958df0df91c5d0f03dea17371
parent d49493218f5c8dc4d193ea78776644ffd799f5f7
author Masahiro Yamada <yamada.masahiro@socionext.com> 1511285907 +0900
committer Masahiro Yamada <yamada.masahiro@socionext.com> 1511882939 +0900

mtd: nand: allow drivers to request minimum alignment for passed buffer

In some cases, nand_do_{read,write}_ops is passed with unaligned
ops->datbuf.  Drivers using DMA will be unhappy about unaligned
buffer.

The new struct member, buf_align, represents the minimum alignment
the driver require for the buffer.  If the buffer passed from the
upper MTD layer does not have enough alignment, nand_do_*_ops will
use bufpoi.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>

[Linux commit: 477544c62a84d3bacd9f90ba75ffc16c04d78071]