qeth: fix page breaks in hw headers
Turning on memory debugging showed there could be page breaks in
hardware headers. OSA does not allow this so we had to add code
to bounce the header in case there is a page break. This patch also
fixes a problem in case the skb->data part of a fragmented skb
spreads multiple pages.
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index e7942cc..32d07c2 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -712,10 +712,13 @@
goto tx_drop;
}
- if (card->info.type != QETH_CARD_TYPE_IQD)
+ if (card->info.type != QETH_CARD_TYPE_IQD) {
+ if (qeth_hdr_chk_and_bounce(new_skb,
+ sizeof(struct qeth_hdr_layer2)))
+ goto tx_drop;
rc = qeth_do_send_packet(card, queue, new_skb, hdr,
elements);
- else
+ } else
rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
elements, data_offset, hd_len);
if (!rc) {