From: Viktor Babrian <babrian.viktor@xxxxxxxxxxxx>
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@xxxxxxxxxxxx>
Cc: linux-stable <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
---
Hello Greg,
this is:
7ffd7b4e169d can: c_can: end pending transmission on network stop (ifdown)
ported to 3.18.5.
regards,
Marc
drivers/net/can/c_can/c_can.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/net/can/c_can/c_can.c b/drivers/net/can/c_can/c_can.c
index 8e78bb48f5a4..60285820f7b4 100644
--- a/drivers/net/can/c_can/c_can.c
+++ b/drivers/net/can/c_can/c_can.c
@@ -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;
}
--
2.1.4
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