5.4-stable review patch. If anyone has any objections, please let me know.
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From: Oleksij Rempel o.rempel@pengutronix.de
commit 9ad1da14ab3bf23087ae45fe399d84a109ddb81a upstream.
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/can/j1939/transport.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/net/can/j1939/transport.c +++ b/net/can/j1939/transport.c @@ -1662,6 +1662,8 @@ static int j1939_xtp_rx_rts_session_acti
j1939_session_timers_cancel(session); j1939_session_cancel(session, J1939_XTP_ABORT_BUSY); + if (session->transmission) + j1939_session_deactivate_activate_next(session);
return -EBUSY; }