[PATCH] s390: qeth driver fixes

From: Frank Blaschka <Frank.Blaschka@de.ibm.com>
From: Frank Pavlic <fpavlic@de.ibm.com>

        - fix fake_ll during initial device bringup. fake_ll was
	  not active after first start of the device.
	  Problem only occured when qeth was built without IPV6 support.
        - avoid skb usage after invocation of qeth_flush_buffers,
	  because skb might already be freed.
        - remove yet another useless netif_wake_queue in
	  qeth_softsetup_ipv6 since this function is only called
	  when device is going online. In this case card->state will
	  never be in state UP. So let the net_device queue down .

Signed-off-by: Frank Pavlic <fpavlic@de.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 13 insertions, 10 deletions

diff --git a/drivers/s390/net/qeth_main.c b/drivers/s390/net/qeth_main.c
index 0f6648fdec1..9dbb5be2b63 100644
--- a/drivers/s390/net/qeth_main.c
+++ b/drivers/s390/net/qeth_main.c
@@ -3798,11 +3798,11 @@ qeth_open(struct net_device *dev)
                 QETH_DBF_TEXT(trace,4,"nomacadr");
                 return -EPERM;
         }
-        card->dev->flags |= IFF_UP;
-        netif_start_queue(dev);
         card->data.state = CH_STATE_UP;
         card->state = CARD_STATE_UP;
-
+        card->dev->flags |= IFF_UP;
+        netif_start_queue(dev);
+        
         if (!card->lan_online && netif_carrier_ok(dev))
                 netif_carrier_off(dev);
         return 0;
@@ -3958,7 +3958,7 @@ qeth_prepare_skb(struct qeth_card *card, struct sk_buff **skb,
 #endif
         *hdr = (struct qeth_hdr *)
                 qeth_push_skb(card, skb, sizeof(struct qeth_hdr));
-        if (hdr == NULL)
+        if (*hdr == NULL)
                 return -EINVAL;
         return 0;
 }
@@ -4416,6 +4416,8 @@ qeth_send_packet(struct qeth_card *card, struct sk_buff *skb)
         enum qeth_large_send_types large_send = QETH_LARGE_SEND_NO;
         struct qeth_eddp_context *ctx = NULL;
         int tx_bytes = skb->len;
+        unsigned short nr_frags = skb_shinfo(skb)->nr_frags;
+        unsigned short tso_size = skb_shinfo(skb)->tso_size;
         int rc;
 
         QETH_DBF_TEXT(trace, 6, "sendpkt");
@@ -4498,16 +4500,16 @@ qeth_send_packet(struct qeth_card *card, struct sk_buff *skb)
                 card->stats.tx_packets++;
                 card->stats.tx_bytes += tx_bytes;
 #ifdef CONFIG_QETH_PERF_STATS
-                if (skb_shinfo(skb)->tso_size &&
+                if (tso_size &&
                    !(large_send == QETH_LARGE_SEND_NO)) {
-                        card->perf_stats.large_send_bytes += skb->len;
+                        card->perf_stats.large_send_bytes += tx_bytes;
                         card->perf_stats.large_send_cnt++;
                 }
-                if (skb_shinfo(skb)->nr_frags > 0){
+                if (nr_frags > 0){
                         card->perf_stats.sg_skbs_sent++;
                         /* nr_frags + skb->data */
                         card->perf_stats.sg_frags_sent +=
-                                skb_shinfo(skb)->nr_frags + 1;
+                                nr_frags + 1;
                 }
 #endif /* CONFIG_QETH_PERF_STATS */
         }
@@ -6370,6 +6372,9 @@ qeth_netdev_init(struct net_device *dev)
         if (!(card->info.unique_id & UNIQUE_ID_NOT_BY_CARD))
                 card->dev->dev_id = card->info.unique_id & 0xffff;
 #endif
+        if (card->options.fake_ll && 
+                (qeth_get_netdev_flags(card) & IFF_NOARP))
+                        dev->hard_header = qeth_fake_header;
         dev->hard_header_parse = NULL;
         dev->set_mac_address = qeth_layer2_set_mac_address;
         dev->flags |= qeth_get_netdev_flags(card);
@@ -7031,14 +7036,12 @@ qeth_softsetup_ipv6(struct qeth_card *card)
 
         QETH_DBF_TEXT(trace,3,"softipv6");
 
-        netif_tx_disable(card->dev);
         rc = qeth_send_startlan(card, QETH_PROT_IPV6);
         if (rc) {
                 PRINT_ERR("IPv6 startlan failed on %s\n",
                           QETH_CARD_IFNAME(card));
                 return rc;
         }
-        netif_wake_queue(card->dev);
         rc = qeth_query_ipassists(card,QETH_PROT_IPV6);
         if (rc) {
                 PRINT_ERR("IPv6 query ipassist failed on %s\n",