From ba8805b97320416e7c5bb8f55d2bd06d5c319e7d Mon Sep 17 00:00:00 2001
From: NeilBrown <neilb@suse.de>
Date: Thu, 14 Nov 2013 15:16:15 +1100
Subject: [PATCH] md/raid5.c: add proper locking to error path of
 raid5_start_reshape.

If raid5_start_reshape errors out, we need to reset all the fields
that were updated (not just some), and need to use the seq_counter
to ensure make_request() doesn't use an inconsitent state.

Signed-off-by: NeilBrown <neilb@suse.de>
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