Re: [PATCH 5/6] can: c_can: prepare to up the message objects number
From: Marc Kleine-Budde
Date: Thu Feb 25 2021 - 02:25:42 EST
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 |
Embedded Linux |
https://www.pengutronix.de |
Vertretung West/Dortmund | Phone: +49-231-2826-924 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
Attachment:
signature.asc
Description: PGP signature