From: Andreas Gruenbacher <agruen@linbit.com>
Date: Tue, 25 Jun 2013 14:50:03 +0000 (+0200)
Subject: drbd: Do not sleep inside rcu
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=26ea8f9239a062a47cfef38ea9c63409906366ff;p=openwrt%2Fstaging%2Fblogic.git

drbd: Do not sleep inside rcu

Signed-off-by: Andreas Gruenbacher <agruen@linbit.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index 4222affff488..adee58e19e83 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -1039,6 +1039,8 @@ randomize:
 	rcu_read_lock();
 	idr_for_each_entry(&tconn->volumes, mdev, vnr) {
 		kref_get(&mdev->kref);
+		rcu_read_unlock();
+
 		/* Prevent a race between resync-handshake and
 		 * being promoted to Primary.
 		 *
@@ -1049,8 +1051,6 @@ randomize:
 		mutex_lock(mdev->state_mutex);
 		mutex_unlock(mdev->state_mutex);
 
-		rcu_read_unlock();
-
 		if (discard_my_data)
 			set_bit(DISCARD_MY_DATA, &mdev->flags);
 		else