From: Pekon Gupta <pekon@ti.com>
Date: Tue, 6 May 2014 04:11:32 +0000 (+0530)
Subject: mtd: eLBC NAND: fix subpage write support
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~57^2~29
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f034d87def51f026b735d1e2877e9387011b2ba3;p=pandora-kernel.git

mtd: eLBC NAND: fix subpage write support

As subpage write is enabled by default for all drivers, nand_write_subpage_hwecc
causes a crash if the driver did not register ecc->hwctl or ecc->calculate.
This behavior was introduced in
   commit 837a6ba4f3b6d23026674e6af6b6849a4634fff9
   "mtd: nand: subpage write support for hardware based ECC schemes".

This fixes a crash by emulating subpage write support by padding sub-page data
with 0xff on either sides to make it full page compatible.

Reported-by: Helmut Schaa <helmut.schaa@googlemail.com>
Tested-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Pekon Gupta <pekon@ti.com>
Reviewed-by: Scott Wood <scottwood@freescale.com>
Cc: <stable@vger.kernel.org> # 3.10.x+
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
---

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