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Commit cb2518ca authored by Stephane Grosjean's avatar Stephane Grosjean Committed by Marc Kleine-Budde
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can: add ability to allocate CANFD frame in skb data 



This patch adds the ability of allocating a CANFD frame data structure in the
skb data area.

Signed-off-by: default avatarStephane Grosjean <s.grosjean@peak-system.com>
Acked-by: default avatarOliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: default avatarMarc Kleine-Budde <mkl@pengutronix.de>
parent 16f6b87a

drivers/net/can/dev.c

+24 −0
Original line number Diff line number Diff line
@@ -521,6 +521,30 @@ struct sk_buff *alloc_can_skb(struct net_device *dev, struct can_frame **cf) 
}

EXPORT_SYMBOL_GPL(alloc_can_skb);



struct sk_buff *alloc_canfd_skb(struct net_device *dev,

				struct canfd_frame **cfd)

{

	struct sk_buff *skb;



	skb = netdev_alloc_skb(dev, sizeof(struct can_skb_priv) +

			       sizeof(struct canfd_frame));

	if (unlikely(!skb))

		return NULL;



	skb->protocol = htons(ETH_P_CANFD);

	skb->pkt_type = PACKET_BROADCAST;

	skb->ip_summed = CHECKSUM_UNNECESSARY;



	can_skb_reserve(skb);

	can_skb_prv(skb)->ifindex = dev->ifindex;



	*cfd = (struct canfd_frame *)skb_put(skb, sizeof(struct canfd_frame));

	memset(*cfd, 0, sizeof(struct canfd_frame));



	return skb;

}

EXPORT_SYMBOL_GPL(alloc_canfd_skb);



struct sk_buff *alloc_can_err_skb(struct net_device *dev, struct can_frame **cf)

{

	struct sk_buff *skb;

include/linux/can/dev.h

+2 −0
Original line number Diff line number Diff line
@@ -124,6 +124,8 @@ unsigned int can_get_echo_skb(struct net_device *dev, unsigned int idx); 
void can_free_echo_skb(struct net_device *dev, unsigned int idx);



struct sk_buff *alloc_can_skb(struct net_device *dev, struct can_frame **cf);

struct sk_buff *alloc_canfd_skb(struct net_device *dev,

				struct canfd_frame **cfd);

struct sk_buff *alloc_can_err_skb(struct net_device *dev,

				  struct can_frame **cf);