can: c_can: disable one shot mode until driver is fixed

This patch disables the one shot mode, until the driver has been fixed and
tested to support it.

> I'm quite sure I've seen a situation where msg_obj 17 "seemed" to be
> pending, while msg_obj 18 and 19 already have been transmitted. But
> in that case, I enabled ONESHOT for the can interface, which enables
> the DA mode (automatic retransmission is disabled).

Reported-by: Jan Altenberg <jan@linutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Kurt Van Dijck <kurt.van.dijck@eia.be>
Cc: Bhupesh Sharma <bhupesh.sharma@st.com>
Acked-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 10 deletions

diff --git a/drivers/net/can/c_can/c_can.c b/drivers/net/can/c_can/c_can.c
index 110eda01843c..d0bffb08aef5 100644
--- a/drivers/net/can/c_can/c_can.c
+++ b/drivers/net/can/c_can/c_can.c
@@ -588,14 +588,9 @@ static void c_can_chip_config(struct net_device *dev)
 {
         struct c_can_priv *priv = netdev_priv(dev);
 
-        if (priv->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT)
-                /* disable automatic retransmission */
-                priv->write_reg(priv, &priv->regs->control,
-                                CONTROL_DISABLE_AR);
-        else
-                /* enable automatic retransmission */
-                priv->write_reg(priv, &priv->regs->control,
-                                CONTROL_ENABLE_AR);
+        /* enable automatic retransmission */
+        priv->write_reg(priv, &priv->regs->control,
+                        CONTROL_ENABLE_AR);
 
         if (priv->can.ctrlmode & (CAN_CTRLMODE_LISTENONLY &
                                         CAN_CTRLMODE_LOOPBACK)) {
@@ -1112,8 +1107,7 @@ struct net_device *alloc_c_can_dev(void)
         priv->can.bittiming_const = &c_can_bittiming_const;
         priv->can.do_set_mode = c_can_set_mode;
         priv->can.do_get_berr_counter = c_can_get_berr_counter;
-        priv->can.ctrlmode_supported = CAN_CTRLMODE_ONE_SHOT |
-                                        CAN_CTRLMODE_LOOPBACK |
+        priv->can.ctrlmode_supported = CAN_CTRLMODE_LOOPBACK |
                                         CAN_CTRLMODE_LISTENONLY |
                                         CAN_CTRLMODE_BERR_REPORTING;