From: Robert Jarzmik <robert.jarzmik@free.fr>
Date: Thu, 22 Mar 2012 20:00:53 +0000 (+0100)
Subject: mtd: docg3 add protection against concurrency
X-Git-Tag: v3.4-rc1~16^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7b0e67f604e1829e5292e1ad7743eb18dc42ea7c;p=pandora-kernel.git

mtd: docg3 add protection against concurrency

As docg3 is intolerant against reentrancy, especially
because of its weird register access (ie. a register read is
performed by a first register write), each access to the
docg3 IO space must be locked.

Lock the IO space with a mutex, shared by all chips on the
same cascade, as they all share the same IO space.

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
---

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