[PATCH 1/3] staging: r8188eu: Remove unused nat25_handle_frame()

[Fabio M. De Francesco]

Remove nat25_handle_frame() because it is not called by any other
function of the driver.

Signed-off-by: Fabio M. De Francesco <fmdefrancesco@xxxxxxxxx>
---
 drivers/staging/r8188eu/core/rtw_br_ext.c    | 61 --------------------
 drivers/staging/r8188eu/include/recv_osdep.h |  1 -
 2 files changed, 62 deletions(-)

diff --git a/drivers/staging/r8188eu/core/rtw_br_ext.c b/drivers/staging/r8188eu/core/rtw_br_ext.c
index 22737cd0fe44..5035f354081f 100644
--- a/drivers/staging/r8188eu/core/rtw_br_ext.c
+++ b/drivers/staging/r8188eu/core/rtw_br_ext.c
@@ -1019,67 +1019,6 @@ int nat25_db_handle(struct adapter *priv, struct sk_buff *skb, int method)
 	return -1;
 }
 
-int nat25_handle_frame(struct adapter *priv, struct sk_buff *skb)
-{
-	if (!(skb->data[0] & 1)) {
-		int is_vlan_tag = 0, i, retval = 0;
-		unsigned short vlan_hdr = 0;
-		unsigned short protocol;
-
-		protocol = be16_to_cpu(*((__be16 *)(skb->data + 2 * ETH_ALEN)));
-		if (protocol == ETH_P_8021Q) {
-			is_vlan_tag = 1;
-			vlan_hdr = *((unsigned short *)(skb->data+ETH_ALEN*2+2));
-			for (i = 0; i < 6; i++)
-				*((unsigned short *)(skb->data+ETH_ALEN*2+2-i*2)) = *((unsigned short *)(skb->data+ETH_ALEN*2-2-i*2));
-			skb_pull(skb, 4);
-		}
-
-		if (!priv->ethBrExtInfo.nat25_disable) {
-			spin_lock_bh(&priv->br_ext_lock);
-			/*
-			 *	This function look up the destination network address from
-			 *	the NAT2.5 database. Return value = -1 means that the
-			 *	corresponding network protocol is NOT support.
-			 */
-			if (!priv->ethBrExtInfo.nat25sc_disable &&
-			    (be16_to_cpu(*((__be16 *)(skb->data+ETH_ALEN*2))) == ETH_P_IP) &&
-			    !memcmp(priv->scdb_ip, skb->data+ETH_HLEN+16, 4)) {
-				memcpy(skb->data, priv->scdb_mac, ETH_ALEN);
-
-				spin_unlock_bh(&priv->br_ext_lock);
-			} else {
-				spin_unlock_bh(&priv->br_ext_lock);
-
-				retval = nat25_db_handle(priv, skb, NAT25_LOOKUP);
-			}
-		} else {
-			if (((be16_to_cpu(*((__be16 *)(skb->data+ETH_ALEN*2))) == ETH_P_IP) &&
-			    !memcmp(priv->br_ip, skb->data+ETH_HLEN+16, 4)) ||
-			    ((be16_to_cpu(*((__be16 *)(skb->data+ETH_ALEN*2))) == ETH_P_ARP) &&
-			    !memcmp(priv->br_ip, skb->data+ETH_HLEN+24, 4))) {
-				/*  for traffic to upper TCP/IP */
-				retval = nat25_db_handle(priv, skb, NAT25_LOOKUP);
-			}
-		}
-
-		if (is_vlan_tag) {
-			skb_push(skb, 4);
-			for (i = 0; i < 6; i++)
-				*((unsigned short *)(skb->data+i*2)) = *((unsigned short *)(skb->data+4+i*2));
-			*((__be16 *)(skb->data+ETH_ALEN*2)) = __constant_htons(ETH_P_8021Q);
-			*((unsigned short *)(skb->data+ETH_ALEN*2+2)) = vlan_hdr;
-		}
-
-		if (retval == -1) {
-			/* DEBUG_ERR("NAT25: Lookup fail!\n"); */
-			return -1;
-		}
-	}
-
-	return 0;
-}
-
 #define SERVER_PORT			67
 #define CLIENT_PORT			68
 #define DHCP_MAGIC			0x63825363
diff --git a/drivers/staging/r8188eu/include/recv_osdep.h b/drivers/staging/r8188eu/include/recv_osdep.h
index 7308f21c428f..72ddf515071e 100644
--- a/drivers/staging/r8188eu/include/recv_osdep.h
+++ b/drivers/staging/r8188eu/include/recv_osdep.h
@@ -30,7 +30,6 @@ int rtw_os_recvbuf_resource_free(struct adapter *adapt, struct recv_buf *buf);
 void rtw_os_read_port(struct adapter *padapter, struct recv_buf *precvbuf);
 
 void rtw_init_recv_timer(struct recv_reorder_ctrl *preorder_ctrl);
-int nat25_handle_frame(struct adapter *priv, struct sk_buff *skb);
 int _netdev_open(struct net_device *pnetdev);
 int netdev_open(struct net_device *pnetdev);
 int netdev_close(struct net_device *pnetdev);
-- 
2.32.0