[PATCH 1/1] j1939: recover socket queue on CAN bus error during BAM transmission

[Oleksij Rempel]

Addresses an issue where a CAN bus error during a BAM transmission could
stall the socket queue, preventing further transmissions even after the
bus error is resolved. The fix activates the next queued session after
the error recovery, allowing communication to continue.

Fixes: 9d71dd0c70099 ("can: add support of SAE J1939 protocol")
Cc: stable@xxxxxxxxxxxxxxx
Reported-by: Alexander Hölzl <alexander.hoelzl@xxxxxxx>
Tested-by: Alexander Hölzl <alexander.hoelzl@xxxxxxx>
Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
---
 net/can/j1939/transport.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/can/j1939/transport.c b/net/can/j1939/transport.c
index fe3df23a25957..9805124d16763 100644
--- a/net/can/j1939/transport.c
+++ b/net/can/j1939/transport.c
@@ -1681,6 +1681,8 @@ static int j1939_xtp_rx_rts_session_active(struct j1939_session *session,
 
 		j1939_session_timers_cancel(session);
 		j1939_session_cancel(session, J1939_XTP_ABORT_BUSY);
+		if (session->transmission)
+			j1939_session_deactivate_activate_next(session);
 
 		return -EBUSY;
 	}
-- 
2.39.2