From: Ivan Djelic <ivan.djelic@parrot.com>
Date: Tue, 17 Apr 2012 11:11:53 +0000 (+0200)
Subject: mtd: nand: omap: fix race condition in omap_wait()
X-Git-Tag: v3.5-rc1~8^2~58
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a9c465f07c2dcd515d20b96f93470762f9ae08b6;p=pandora-kernel.git

mtd: nand: omap: fix race condition in omap_wait()

If a context switch occurs in function omap_wait() just before the
while loop is entered, then upon return from context switch the
timeout may already have elapsed: in that case, status is never
read from NAND device, and omap_wait() returns an error.
This failure has been experimentally observed during stress tests.

This patch ensures a NAND status read is always performed before
returning, as in the generic nand_wait() function.

Signed-off-by: Ivan Djelic <ivan.djelic@parrot.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
---

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