can: c_can: end pending transmission on network stop (ifdown)
Put controller into init mode in network stop to end pending transmissions. The
issue is observed in cases when transmitted frame is not acked.
Signed-off-by: Viktor Babrian <babrian.viktor@renyi.mta.hu>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
diff --git a/drivers/net/can/c_can/c_can.c b/drivers/net/can/c_can/c_can.c
index f94a9fa..c672c4d 100644
--- a/drivers/net/can/c_can/c_can.c
+++ b/drivers/net/can/c_can/c_can.c
@@ -615,6 +615,9 @@
c_can_irq_control(priv, false);
+ /* put ctrl to init on stop to end ongoing transmission */
+ priv->write_reg(priv, C_CAN_CTRL_REG, CONTROL_INIT);
+
/* deactivate pins */
pinctrl_pm_select_sleep_state(dev->dev.parent);
priv->can.state = CAN_STATE_STOPPED;