qeth: l3 fix len in tso hdr

The tso hdr is longer then the regular l3 hdr. Fix the calculation
of the total len by accounting the size of the tso hdr.

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_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index 3ddd5ad..a1abb37 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -2939,6 +2939,7 @@
 
 	/*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;