From d47648fcf0611812286f68131b40251c6fa54f5e Mon Sep 17 00:00:00 2001
From: Shaohua Li <shli@kernel.org>
Date: Sat, 19 Oct 2013 14:51:42 +0800
Subject: [PATCH] raid5: avoid finding "discard" stripe

SCSI discard will damage discard stripe bio setting, eg, some fields are
changed. If the stripe is reused very soon, we have wrong bios setting. We
remove discard stripe from hash list, so next time the strip will be fully
initialized.

Suitable for backport to 3.7+.

Cc: <stable@vger.kernel.org> (3.7+)
Signed-off-by: Shaohua Li <shli@fusionio.com>
Signed-off-by: NeilBrown <neilb@suse.de>
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