[PATCH 06/12] nbd: make session_close() idempotent

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Signed-off-by: Marc-André Lureau <marcandre.lureau@xxxxxxxxxx>
---
 block/nbd-client.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/block/nbd-client.c b/block/nbd-client.c
index b7eea21..c49be30 100644
--- a/block/nbd-client.c
+++ b/block/nbd-client.c
@@ -352,7 +352,12 @@ static void nbd_teardown_connection(NbdClientSession *client)
 
 void nbd_client_session_close(NbdClientSession *client)
 {
+    if (!client->bs) {
+        return;
+    }
+
     nbd_teardown_connection(client);
+    client->bs = NULL;
 }
 
 int nbd_client_session_init(NbdClientSession *client, BlockDriverState *bs,
-- 
1.8.3.rc1.49.g8d97506

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