can: rework skb reserved data handling

Added accessor and skb_reserve helpers for struct can_skb_priv.
Removed pointless skb_headroom() check.

Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
CC: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c
index 59ada082a994..f9cba4123c66 100644
--- a/drivers/net/can/dev.c
+++ b/drivers/net/can/dev.c
@@ -512,8 +512,8 @@ struct sk_buff *alloc_can_skb(struct net_device *dev, struct can_frame **cf)
         skb->pkt_type = PACKET_BROADCAST;
         skb->ip_summed = CHECKSUM_UNNECESSARY;
 
-        skb_reserve(skb, sizeof(struct can_skb_priv));
-        ((struct can_skb_priv *)(skb->head))->ifindex = dev->ifindex;
+        can_skb_reserve(skb);
+        can_skb_prv(skb)->ifindex = dev->ifindex;
 
         *cf = (struct can_frame *)skb_put(skb, sizeof(struct can_frame));
         memset(*cf, 0, sizeof(struct can_frame));