Thread (17 messages) 17 messages, 2 authors, 2017-12-20

[PATCH net-next 14/15] s390/qeth: pass full data length to l3_fill_header()

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From: Julian Wiedmann <hidden>
Date: 2017-12-20 19:11:40
Also in: linux-s390
Subsystem: networking drivers, s390 architecture, s390 network drivers, the rest · Maintainers: Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Heiko Carstens, Vasily Gorbik, Alexander Gordeev, Alexandra Winter, Aswin Karuvally, Linus Torvalds

The TSO and IQD paths already need to fix-up the current values, and
OSA will require more flexibility in the future as well. So just let
the caller specify the data length.

Signed-off-by: Julian Wiedmann <redacted>
---
 drivers/s390/net/qeth_l3_main.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index 39b41e24318b..e31cc4fa544c 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -2405,11 +2405,12 @@ static u8 qeth_l3_cast_type_to_flag(int cast_type)
 }
 
 static void qeth_l3_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
-				struct sk_buff *skb, int ipv, int cast_type)
+				struct sk_buff *skb, int ipv, int cast_type,
+				unsigned int data_len)
 {
 	memset(hdr, 0, sizeof(struct qeth_hdr));
 	hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
-	hdr->hdr.l3.length = skb->len - sizeof(struct qeth_hdr);
+	hdr->hdr.l3.length = data_len;
 
 	/*
 	 * before we're going to overwrite this location with next hop ip.
@@ -2488,7 +2489,6 @@ static void qeth_tso_fill_header(struct qeth_card *card,
 
 	/*fix header to TSO values ...*/
 	hdr->hdr.hdr.l3.id = QETH_HEADER_TYPE_TSO;
-	hdr->hdr.hdr.l3.length = skb->len - sizeof(struct qeth_hdr_tso);
 	/*set values which are fix for the first approach ...*/
 	hdr->ext.hdr_tot_len = (__u16) sizeof(struct qeth_hdr_ext_tso);
 	hdr->ext.imb_hdr_no  = 1;
@@ -2649,21 +2649,23 @@ static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb,
 	if (use_tso) {
 		hdr = skb_push(new_skb, sizeof(struct qeth_hdr_tso));
 		memset(hdr, 0, sizeof(struct qeth_hdr_tso));
-		qeth_l3_fill_header(card, hdr, new_skb, ipv, cast_type);
+		qeth_l3_fill_header(card, hdr, new_skb, ipv, cast_type,
+				    new_skb->len - sizeof(struct qeth_hdr_tso));
 		qeth_tso_fill_header(card, hdr, new_skb);
 		hdr_elements++;
 	} else {
 		if (data_offset < 0) {
 			hdr = skb_push(new_skb, sizeof(struct qeth_hdr));
-			qeth_l3_fill_header(card, hdr, new_skb, ipv,
-						cast_type);
+			qeth_l3_fill_header(card, hdr, new_skb, ipv, cast_type,
+					    new_skb->len -
+					    sizeof(struct qeth_hdr));
 		} else {
 			if (be16_to_cpu(new_skb->protocol) == ETH_P_AF_IUCV)
 				qeth_l3_fill_af_iucv_hdr(card, hdr, new_skb);
 			else {
 				qeth_l3_fill_header(card, hdr, new_skb, ipv,
-							cast_type);
-				hdr->hdr.l3.length = new_skb->len - data_offset;
+						    cast_type,
+						    new_skb->len - data_offset);
 			}
 		}
 
-- 
2.13.5
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