can: omit unneeded skb_clone() calls
The AF_CAN core delivered always cloned sk_buffs to the AF_CAN
protocols, although this was _only_ needed by the can-raw protocol.
With this (additionally documented) change, the AF_CAN core calls the
callback functions of the registered AF_CAN protocols with the original
(uncloned) sk_buff pointer and let's the can-raw protocol do the
skb_clone() itself which omits all unneeded skb_clone() calls for other
AF_CAN protocols.
Signed-off-by: Oliver Hartkopp <oliver@hartkopp.net>
Signed-off-by: Urs Thuermann <urs.thuermann@volkswagen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/can/bcm.c b/net/can/bcm.c
index 6248ae2..1649c8a 100644
--- a/net/can/bcm.c
+++ b/net/can/bcm.c
@@ -633,7 +633,7 @@
hrtimer_cancel(&op->timer);
if (op->can_id != rxframe->can_id)
- goto rx_freeskb;
+ return;
/* save rx timestamp */
op->rx_stamp = skb->tstamp;
@@ -645,19 +645,19 @@
if (op->flags & RX_RTR_FRAME) {
/* send reply for RTR-request (placed in op->frames[0]) */
bcm_can_tx(op);
- goto rx_freeskb;
+ return;
}
if (op->flags & RX_FILTER_ID) {
/* the easiest case */
bcm_rx_update_and_send(op, &op->last_frames[0], rxframe);
- goto rx_freeskb_starttimer;
+ goto rx_starttimer;
}
if (op->nframes == 1) {
/* simple compare with index 0 */
bcm_rx_cmp_to_index(op, 0, rxframe);
- goto rx_freeskb_starttimer;
+ goto rx_starttimer;
}
if (op->nframes > 1) {
@@ -678,10 +678,8 @@
}
}
-rx_freeskb_starttimer:
+rx_starttimer:
bcm_rx_starttimer(op);
-rx_freeskb:
- kfree_skb(skb);
}
/*