From 9a399364092646d95f54eb43014594fa4c824cf1 Mon Sep 17 00:00:00 2001 From: Viktor Babrian Date: Sun, 18 Jan 2015 20:01:40 +0100 Subject: [PATCH] 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 Cc: linux-stable Signed-off-by: Marc Kleine-Budde --- drivers/net/can/c_can/c_can.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/can/c_can/c_can.c b/drivers/net/can/c_can/c_can.c index f94a9fa60488e..c672c4dcffac1 100644 --- a/drivers/net/can/c_can/c_can.c +++ b/drivers/net/can/c_can/c_can.c @@ -615,6 +615,9 @@ static void c_can_stop(struct net_device *dev) 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; -- 2.39.5