From: Brian Norris <computersforpeace@gmail.com>
Date: Sat, 14 Jan 2012 02:11:47 +0000 (-0800)
Subject: mtd: nand: erase block before marking bad
X-Git-Tag: v3.4-rc1~16^2~114
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=009184296d957d864d6fa9ac2dd192d29e069878;p=pandora-kernel.git

mtd: nand: erase block before marking bad

Many NAND flash systems (especially those with MLC NAND) cannot be
reliably written twice in a row. For instance, when marking a bad block,
the block may already have data written to it, and so we should attempt
to erase the block before writing a bad block marker to its OOB region.

We can ignore erase failures, since the block may be bad such that it
cannot be erased properly; we still attempt to write zeros to its spare
area.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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