From: Tadashi Abe <tabe@mvista.com>
Date: Thu, 19 May 2011 06:58:15 +0000 (+0900)
Subject: mtd: fix hang-up in cfi erase and read contention
X-Git-Tag: v3.0-rc1~32^2~64
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=100f2341e305f98de3aa12fb472771ab029cbda7;p=pandora-kernel.git

mtd: fix hang-up in cfi erase and read contention

cfi erase command hangs up when erase and read contention occurs.
If read runs at the same address as erase operation, read issues
Erase-Suspend via get_chip() and the erase goes into sleep in wait queue.
But in this case, read operation exits by time-out without waking it up.

I think the other variants (0001, 0020 and lpddr) have the same problem too.
Tested and verified the patch only on CFI-0002 flash, though.

Signed-off-by: Tadashi Abe <tabe@mvista.com>
Acked-by: Joakim Tjernlund <joakim.tjernlund@transmode.se>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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