From 700e432d8364ce59c521abbe03a522051610ebc2 Mon Sep 17 00:00:00 2001
From: NeilBrown <neilb@suse.de>
Date: Mon, 28 Nov 2005 13:44:10 -0800
Subject: [PATCH] md: fix locking problem in r5/r6

bitmap_unplug actually writes data (bits) to storage, so we shouldn't be
holding a spinlock...

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 drivers/md/raid5.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'drivers/md/raid5.c')

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index e2a40283e32..36d5f8ac826 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -1704,7 +1704,9 @@ static void raid5d (mddev_t *mddev)
 
 		if (conf->seq_flush - conf->seq_write > 0) {
 			int seq = conf->seq_flush;
+			spin_unlock_irq(&conf->device_lock);
 			bitmap_unplug(mddev->bitmap);
+			spin_lock_irq(&conf->device_lock);
 			conf->seq_write = seq;
 			activate_bit_delay(conf);
 		}
-- 
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