From: Kamal Dasu <kdasu.kdev@gmail.com>
Date: Fri, 2 May 2014 00:51:19 +0000 (-0400)
Subject: mtd: nand: Add support to use nand_base poi databuf as bounce buffer
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~57^2~27
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=66507c7bc8895f0da6b4ad87e96d61a9f7d7a118;p=pandora-kernel.git

mtd: nand: Add support to use nand_base poi databuf as bounce buffer

nand_base can be passed a kmap()'d buffers from highmem by
filesystems like jffs2. This results in failure to map the
physical address of the DMA buffer on various contoller
driver on different platforms. This change adds a chip option
to use preallocated databuf as bounce buffers used in
nand_do_read_ops() and nand_do_write_ops().
This allows for specific nand controller driver to set this
option as needed.

Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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