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/net/can/bcm.c b/net/can/bcm.c
index ccc27b9..28e12d1 100644
--- a/net/can/bcm.c
+++ b/net/can/bcm.c
@@ -261,8 +261,8 @@
if (!skb)
goto out;
- 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;
memcpy(skb_put(skb, CFSIZ), cf, CFSIZ);
@@ -1207,7 +1207,7 @@
if (!skb)
return -ENOMEM;
- skb_reserve(skb, sizeof(struct can_skb_priv));
+ can_skb_reserve(skb);
err = memcpy_fromiovec(skb_put(skb, CFSIZ), msg->msg_iov, CFSIZ);
if (err < 0) {
@@ -1221,7 +1221,7 @@
return -ENODEV;
}
- ((struct can_skb_priv *)(skb->head))->ifindex = dev->ifindex;
+ can_skb_prv(skb)->ifindex = dev->ifindex;
skb->dev = dev;
skb->sk = sk;
err = can_send(skb, 1); /* send with loopback */