Hey Dario,
just a quick note...
On 24.02.2021 23:52:45, Dario Binacchi wrote:
> -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(struct c_can_priv), 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;
> +
> + priv->msg_obj_tx_num = msg_obj_tx_num;
> + priv->msg_obj_tx_first = priv->msg_obj_rx_last + 1;
> + priv->msg_obj_tx_last =
> + priv->msg_obj_tx_first + priv->msg_obj_tx_num - 1;
> +
> + priv->dlc = kcalloc(msg_obj_tx_num, sizeof(*priv->dlc), GFP_KERNEL);
You can pass a larger size to alloc_candev() so that it includes the mem
you allocate here.
> + if (!priv->dlc) {
> + free_candev(dev);
> + return NULL;
> + }
> +
> + netif_napi_add(dev, &priv->napi, c_can_poll, priv->msg_obj_rx_num);
Marc
--
Pengutronix e.K. | Marc Kleine-Budde |
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