mtd: eLBC NAND: fix subpage write support
authorPekon Gupta <pekon@ti.com>
Tue, 6 May 2014 04:11:32 +0000 (09:41 +0530)
committerBrian Norris <computersforpeace@gmail.com>
Tue, 20 May 2014 23:35:31 +0000 (16:35 -0700)
commitf034d87def51f026b735d1e2877e9387011b2ba3
tree2c89a1214796d309856efbbcfe25372df9fc665d
parent81d46c59550997ae17e441c0327ee92f7ba7dc6f
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>
drivers/mtd/nand/fsl_elbc_nand.c