[PATCH net 1/3] can: j1939: j1939_tp_cmd_recv(): ignore abort message in the BAM transport

[Zhang Changzhong <zhangchangzhong@xxxxxxxxxx>]

This patch prevents BAM transport from being closed by receiving abort
message, as specified in SAE-J1939-82 2015 (A.3.3 Row 4).

Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol")
Signed-off-by: Zhang Changzhong <zhangchangzhong@xxxxxxxxxx>
---
 net/can/j1939/transport.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/can/j1939/transport.c b/net/can/j1939/transport.c
index bb5c4b8..2efa606 100644
--- a/net/can/j1939/transport.c
+++ b/net/can/j1939/transport.c
@@ -2081,6 +2081,9 @@ static void j1939_tp_cmd_recv(struct j1939_priv *priv, struct sk_buff *skb)
 		break;
 
 	case J1939_ETP_CMD_ABORT: /* && J1939_TP_CMD_ABORT */
+		if (j1939_cb_is_broadcast(skcb))
+			return;
+
 		if (j1939_tp_im_transmitter(skcb))
 			j1939_xtp_rx_abort(priv, skb, true);
 
-- 
2.9.5