diff options
Diffstat (limited to 'drivers/net/can/dev/dev.c')
| -rw-r--r-- | drivers/net/can/dev/dev.c | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/drivers/net/can/dev/dev.c b/drivers/net/can/dev/dev.c index 15ccedbb3f8d..0cc3d008adb3 100644 --- a/drivers/net/can/dev/dev.c +++ b/drivers/net/can/dev/dev.c @@ -359,44 +359,6 @@ void can_set_default_mtu(struct net_device *dev) } } -/* changing MTU and control mode for CAN/CANFD devices */ -int can_change_mtu(struct net_device *dev, int new_mtu) -{ - struct can_priv *priv = netdev_priv(dev); - u32 ctrlmode_static = can_get_static_ctrlmode(priv); - - /* Do not allow changing the MTU while running */ - if (dev->flags & IFF_UP) - return -EBUSY; - - /* allow change of MTU according to the CANFD ability of the device */ - switch (new_mtu) { - case CAN_MTU: - /* 'CANFD-only' controllers can not switch to CAN_MTU */ - if (ctrlmode_static & CAN_CTRLMODE_FD) - return -EINVAL; - - priv->ctrlmode &= ~CAN_CTRLMODE_FD; - break; - - case CANFD_MTU: - /* check for potential CANFD ability */ - if (!(priv->ctrlmode_supported & CAN_CTRLMODE_FD) && - !(ctrlmode_static & CAN_CTRLMODE_FD)) - return -EINVAL; - - priv->ctrlmode |= CAN_CTRLMODE_FD; - break; - - default: - return -EINVAL; - } - - WRITE_ONCE(dev->mtu, new_mtu); - return 0; -} -EXPORT_SYMBOL_GPL(can_change_mtu); - /* helper to define static CAN controller features at device creation time */ int can_set_static_ctrlmode(struct net_device *dev, u32 static_mode) { |