mtd: nand: allocate aligned buffers if NAND_OWN_BUFFERS is unset

Browse source

Some NAND controllers are using DMA engine requiring a specific
buffer alignment.  The core provides no guarantee on the nand_buffers
pointers, which forces some drivers to allocate their own buffers
and pass the NAND_OWN_BUFFERS flag.

Rework the nand_buffers allocation logic to allocate each buffer
independently.  This should make most NAND controllers/DMA engine
happy, and allow us to get rid of these custom buf allocation in
NAND controller drivers.

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

...

This commit is contained in:

Masahiro Yamada 2017-03-30 17:15:04 +09:00 • committed by Boris Brezillon

parent e7beeeec85

commit 3deb9979c7

1 changed files with 32 additions and 9 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

41

drivers/mtd/nand/nand_base.c

View file