On 25.02.2021 22:51:54, Dario Binacchi wrote:
> --- a/drivers/net/can/c_can/c_can.c
> +++ b/drivers/net/can/c_can/c_can.c
[...]
> -struct net_device *alloc_c_can_dev(void)
> +struct net_device *alloc_c_can_dev(int msg_obj_num)
> {
> struct net_device *dev;
> struct c_can_priv *priv;
> + int msg_obj_tx_num = msg_obj_num / 2;
>
> - dev = alloc_candev(sizeof(struct c_can_priv), C_CAN_MSG_OBJ_TX_NUM);
> + dev = alloc_candev(sizeof(*priv) + sizeof(u32) * msg_obj_tx_num,
> + msg_obj_tx_num);
> if (!dev)
> return NULL;
>
> priv = netdev_priv(dev);
> - netif_napi_add(dev, &priv->napi, c_can_poll, C_CAN_NAPI_WEIGHT);
> + priv->msg_obj_num = msg_obj_num;
> + priv->msg_obj_rx_num = msg_obj_num - msg_obj_tx_num;
> + priv->msg_obj_rx_first = 1;
> + priv->msg_obj_rx_last =
> + priv->msg_obj_rx_first + priv->msg_obj_rx_num - 1;
> + priv->msg_obj_rx_mask = ((u64)1 << priv->msg_obj_rx_num) - 1;Here you're casting the 1 to 64bit, but msg_obj_rx_mask is only u32. Use "1UL", if you are sure that rx_mask would never exceed 32 bit. Marc -- Pengutronix e.K. | Marc Kleine-Budde | Embedded Linux | https://www.pengutronix.de | Vertretung West/Dortmund | Phone: +49-231-2826-924 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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