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>
diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c
index 59ada08..f9cba41 100644
--- a/drivers/net/can/dev.c
+++ b/drivers/net/can/dev.c
@@ -512,8 +512,8 @@
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));
diff --git a/drivers/net/can/slcan.c b/drivers/net/can/slcan.c
index e79a8d1..06b7e09 100644
--- a/drivers/net/can/slcan.c
+++ b/drivers/net/can/slcan.c
@@ -195,8 +195,8 @@
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 = sl->dev->ifindex;
+ can_skb_reserve(skb);
+ can_skb_prv(skb)->ifindex = sl->dev->ifindex;
memcpy(skb_put(skb, sizeof(struct can_frame)),
&cf, sizeof(struct can_frame));