[PATCH 02/11] drbd_receiver: get_ldev before use device->ldev for drbd_reconsider_queue_parameters()

["zhengbing.huang" <zhengbing.huang@easystack.cn>]

From: Dongsheng Yang <dongsheng.yang@easystack.cn>

check ldev is not NULL before use it in drbd_reconsider_queue_parameters()

Signed-off-by: Dongsheng Yang <dongsheng.yang@easystack.cn>
---
 drbd/drbd_receiver.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drbd/drbd_receiver.c b/drbd/drbd_receiver.c
index 49e7815ed..fd07b29d7 100644
--- a/drbd/drbd_receiver.c
+++ b/drbd/drbd_receiver.c
@@ -9845,7 +9845,12 @@ static void conn_disconnect(struct drbd_connection *connection)
 		rcu_read_unlock();
 
 		peer_device_disconnected(peer_device);
-		drbd_reconsider_queue_parameters(device, device->ldev);
+		if (get_ldev(device)) {
+			drbd_reconsider_queue_parameters(device, device->ldev);
+			put_ldev(device);
+		} else {
+			drbd_reconsider_queue_parameters(device, NULL);
+		}
 
 		kref_put(&device->kref, drbd_destroy_device);
 		rcu_read_lock();
-- 
2.27.0