Commit 793332a4 authored Jan 18, 2015 by Viktor Babrian Committed by Greg Kroah-Hartman Feb 05, 2015

can: c_can: end pending transmission on network stop (ifdown)



commit 7ffd7b4e169d619e66928fe5d997723f2c6f1056 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 427a5746

drivers/net/can/c_can/c_can.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -611,6 +611,10 @@ static void c_can_stop(struct net_device *dev)
		struct c_can_priv *priv = netdev_priv(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);

		priv->can.state = CAN_STATE_STOPPED;
		}