From: Oleksij Rempel o.rempel@pengutronix.de

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@vger.kernel.org Reported-by: Alexander Hölzl alexander.hoelzl@gmx.net Tested-by: Alexander Hölzl alexander.hoelzl@gmx.net Signed-off-by: Oleksij Rempel o.rempel@pengutronix.de Link: https://lore.kernel.org/all/20240528070648.1947203-1-o.rempel@pengutronix.de Cc: stable@vger.kernel.org Signed-off-by: Marc Kleine-Budde mkl@pengutronix.de --- 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 c6569f98d251..4be73de5033c 100644 --- a/net/can/j1939/transport.c +++ b/net/can/j1939/transport.c @@ -1696,6 +1696,8 @@ 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; }