[SCSI] cxgb3i: fix connection error when vlan is enabled

There is a bug when VLAN is configured on the cxgb3 interface, the iscsi
conn. would be denied with message "cxgb3i: NOT going through cxgbi device."

This patch adds code to get the real egress net_device when vlan is configured.
Signed-off-by: Karen Xie <kxie@chelsio.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/cxgb3i/cxgb3i_iscsi.c

@@ -13,6 +13,7 @@
 
 #include <linux/inet.h>
 #include <linux/crypto.h>
+#include <linux/if_vlan.h>
 #include <net/dst.h>
 #include <net/tcp.h>
 #include <scsi/scsi_cmnd.h>
@@ -184,6 +185,9 @@ static struct cxgb3i_hba *cxgb3i_hba_find_by_netdev(struct net_device *ndev)
 	struct cxgb3i_adapter *snic;
 	int i;
 
+	if (ndev->priv_flags & IFF_802_1Q_VLAN)
+		ndev = vlan_dev_real_dev(ndev);
+
 	read_lock(&cxgb3i_snic_rwlock);
 	list_for_each_entry(snic, &cxgb3i_snic_list, list_head) {
 		for (i = 0; i < snic->hba_cnt; i++) {