smb: smbdirect: fix the logic in smbdirect_socket_destroy_sync() without an error

If smbdirect_socket_destroy_sync() and sc->first_error was not set
we should set -ESHUTDOWN, that's a better condition
doing it only implicitly with the
sc->status < SMBDIRECT_SOCKET_DISCONNECTING check.

Cc: Steve French <smfrench@gmail.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: Long Li <longli@microsoft.com>
Cc: Namjae Jeon <linkinjeon@kernel.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Henrique Carvalho <henrique.carvalho@suse.com>
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Steve French <stfrench@microsoft.com>

Author: metze-samba

fs/smb/common/smbdirect/smbdirect_socket.c

@@ -600,13 +600,20 @@ void smbdirect_socket_destroy_sync(struct smbdirect_socket *sc)
 	 */
 	WARN_ON_ONCE(in_interrupt());
 
-	smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_INFO,
-		"cancelling and disable disconnect_work\n");
-	disable_work_sync(&sc->disconnect_work);
+	/*
+	 * First we try to disable the work
+	 * without disable_work_sync() in a
+	 * non blocking way, if it's already
+	 * running it will be handles by
+	 * disable_work_sync() below.
+	 *
+	 * Here we just want to make sure queue_work() in
+	 * smbdirect_socket_schedule_cleanup_lvl()
+	 * is a no-op.
+	 */
+	disable_work(&sc->disconnect_work);
 
-	smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_INFO,
-		"destroying rdma session\n");
-	if (sc->status < SMBDIRECT_SOCKET_DISCONNECTING) {
+	if (!sc->first_error)
 		/*
 		 * SMBDIRECT_LOG_INFO is enough here
 		 * as this is the typical case where
@@ -615,8 +622,15 @@ void smbdirect_socket_destroy_sync(struct smbdirect_socket *sc)
 		smbdirect_socket_schedule_cleanup_lvl(sc,
 						      SMBDIRECT_LOG_INFO,
 						      -ESHUTDOWN);
+
+	smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_INFO,
+		"cancelling and disable disconnect_work\n");
+	disable_work_sync(&sc->disconnect_work);
+
+	smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_INFO,
+		"destroying rdma session\n");
+	if (sc->status < SMBDIRECT_SOCKET_DISCONNECTING)
 		smbdirect_socket_cleanup_work(&sc->disconnect_work);
-	}
 	if (sc->status < SMBDIRECT_SOCKET_DISCONNECTED) {
 		smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_INFO,
 			"wait for transport being disconnected\n");