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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>
hifive-unleashed-5.1
Viktor Babrian 2015-01-18 20:01:40 +01:00 committed by Marc Kleine-Budde
parent 06efe0e540
commit 7ffd7b4e16
1 changed files with 3 additions and 0 deletions
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3
drivers/net/can/c_can/c_can.c
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@ -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;