Commit dd22586d authored by Oliver Hartkopp's avatar Oliver Hartkopp Committed by Marc Kleine-Budde
Browse files

can: add bittiming check at interface open for CAN FD

Additionally to have the second (data) bitrate available the data bitrate
has to be greater or equal to the arbitration bitrate in CAN FD.
Signed-off-by: default avatarOliver Hartkopp <>
Acked-by: default avatarStephane Grosjean <>
Signed-off-by: default avatarMarc Kleine-Budde <>
parent bc05a894
......@@ -642,6 +642,14 @@ int open_candev(struct net_device *dev)
return -EINVAL;
/* For CAN FD the data bitrate has to be >= the arbitration bitrate */
if ((priv->ctrlmode & CAN_CTRLMODE_FD) &&
(!priv->data_bittiming.bitrate ||
(priv->data_bittiming.bitrate < priv->bittiming.bitrate))) {
netdev_err(dev, "incorrect/missing data bit-timing\n");
return -EINVAL;
/* Switch carrier on if device was stopped while in bus-off state */
if (!netif_carrier_ok(dev))
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