smb: server: let free_transport() wait for SMBDIRECT_SOCKET_DISCONNECTED

We should wait for the rdma_cm to become SMBDIRECT_SOCKET_DISCONNECTED!

At least on the client side (with similar code)
wait_event_interruptible() often returns with -ERESTARTSYS instead of
waiting for SMBDIRECT_SOCKET_DISCONNECTED.
We should use wait_event() here too, which makes the code be identical
in client and server, which will help when moving to common functions.

Fixes: b316060 ("smb: server: move smb_direct_disconnect_rdma_work() into free_transport()")
Cc: Steve French <smfrench@gmail.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>

Author: metze-samba

fs/smb/server/transport_rdma.c

@@ -451,11 +451,10 @@ static void free_transport(struct smb_direct_transport *t)
 	struct smbdirect_recv_io *recvmsg;
 
 	disable_work_sync(&sc->disconnect_work);
-	if (sc->status < SMBDIRECT_SOCKET_DISCONNECTING) {
+	if (sc->status < SMBDIRECT_SOCKET_DISCONNECTING)
 		smb_direct_disconnect_rdma_work(&sc->disconnect_work);
-		wait_event_interruptible(sc->status_wait,
-					 sc->status == SMBDIRECT_SOCKET_DISCONNECTED);
-	}
+	if (sc->status < SMBDIRECT_SOCKET_DISCONNECTED)
+		wait_event(sc->status_wait, sc->status == SMBDIRECT_SOCKET_DISCONNECTED);
 
 	/*
 	 * Wake up all waiters in all wait queues