Commit b403e685 authored Apr 01, 2008 by Frank Blaschka Committed by Jeff Garzik Apr 16, 2008

qeth: core code should alloc headroom for LLC protocol



Allocate headroom for TR_HLEN but using only ETH_HLEN causes rx
performance degradation. Allocate ETH_HLEN for ethernet and
TR_HLEN for token ring (layer 3 mode).

Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

parent d11ba0c4

drivers/s390/net/qeth_core_main.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -4002,7 +4002,11 @@ struct sk_buff qeth_core_get_next_skb(struct qeth_card card,
		}
		} else {
		skb_len = (*hdr)->hdr.l3.length;
		headroom = max((int)ETH_HLEN, (int)TR_HLEN);
		if ((card->info.link_type == QETH_LINK_TYPE_LANE_TR) \|\|
		(card->info.link_type == QETH_LINK_TYPE_HSTR))
		headroom = TR_HLEN;
		else
		headroom = ETH_HLEN;
		}

		if (!skb_len)