From: Namhyung Kim <namhyung@gmail.com>
Date: Tue, 14 Jun 2011 04:20:19 +0000 (+1000)
Subject: md/raid5: fix FUA request handling in ops_run_io()
X-Git-Tag: v3.0-rc4~98^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b062962edb086011e94ec4d9eb3f6a6d814f2a8f;p=pandora-kernel.git

md/raid5: fix FUA request handling in ops_run_io()

Commit e9c7469bb4f5 ("md: implment REQ_FLUSH/FUA support")
introduced R5_WantFUA flag and set rw to WRITE_FUA in that case.
However remaining code still checks whether rw is exactly same
as WRITE or not, so FUAed-write ends up with being treated as
READ. Fix it.

This bug has been present since 2.6.37 and the fix is suitable for any
-stable kernel since then.  It is not clear why this has not caused
more problems.

Cc: Tejun Heo <tj@kernel.org>
Cc: stable@kernel.org
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
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