hostap: slight optimization of addr compare

Use possibly more efficient ether_addr_equal
instead of memcmp.

Cc: Jouni Malinen <j@w1.fi>
Cc: John W. Linville <linville@tuxdriver.com>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Weilong Chen <chenweilong@huawei.com>
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

5 files changed, 22 insertions, 24 deletions

diff --git a/drivers/net/wireless/hostap/hostap_80211_tx.c b/drivers/net/wireless/hostap/hostap_80211_tx.c
index 344a981a052e..8bde77689469 100644
--- a/drivers/net/wireless/hostap/hostap_80211_tx.c
+++ b/drivers/net/wireless/hostap/hostap_80211_tx.c
@@ -1,5 +1,6 @@
 #include <linux/slab.h>
 #include <linux/export.h>
+#include <linux/etherdevice.h>
 
 #include "hostap_80211.h"
 #include "hostap_common.h"
@@ -103,8 +104,7 @@ netdev_tx_t hostap_data_start_xmit(struct sk_buff *skb,
                         return NETDEV_TX_OK;
                 } else if (local->iw_mode == IW_MODE_INFRA &&
                            (local->wds_type & HOSTAP_WDS_AP_CLIENT) &&
-                           memcmp(skb->data + ETH_ALEN, dev->dev_addr,
-                                  ETH_ALEN) != 0) {
+                           !ether_addr_equal(skb->data + ETH_ALEN, dev->dev_addr)) {
                         /* AP client mode: send frames with foreign src addr
                          * using 4-addr WDS frames */
                         use_wds = WDS_COMPLIANT_FRAME;
diff --git a/drivers/net/wireless/hostap/hostap_ap.c b/drivers/net/wireless/hostap/hostap_ap.c
index d6033a8e5dea..d36e252d2ccb 100644
--- a/drivers/net/wireless/hostap/hostap_ap.c
+++ b/drivers/net/wireless/hostap/hostap_ap.c
@@ -24,6 +24,7 @@
 #include <linux/slab.h>
 #include <linux/export.h>
 #include <linux/moduleparam.h>
+#include <linux/etherdevice.h>
 
 #include "hostap_wlan.h"
 #include "hostap.h"
@@ -106,13 +107,12 @@ static void ap_sta_hash_del(struct ap_data *ap, struct sta_info *sta)
 
         s = ap->sta_hash[STA_HASH(sta->addr)];
         if (s == NULL) return;
-        if (memcmp(s->addr, sta->addr, ETH_ALEN) == 0) {
+        if (ether_addr_equal(s->addr, sta->addr)) {
                 ap->sta_hash[STA_HASH(sta->addr)] = s->hnext;
                 return;
         }
 
-        while (s->hnext != NULL && memcmp(s->hnext->addr, sta->addr, ETH_ALEN)
-               != 0)
+        while (s->hnext != NULL && !ether_addr_equal(s->hnext->addr, sta->addr))
                 s = s->hnext;
         if (s->hnext != NULL)
                 s->hnext = s->hnext->hnext;
@@ -435,7 +435,7 @@ int ap_control_del_mac(struct mac_restrictions *mac_restrictions, u8 *mac)
              ptr != &mac_restrictions->mac_list; ptr = ptr->next) {
                 entry = list_entry(ptr, struct mac_entry, list);
 
-                if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
+                if (ether_addr_equal(entry->addr, mac)) {
                         list_del(ptr);
                         kfree(entry);
                         mac_restrictions->entries--;
@@ -459,7 +459,7 @@ static int ap_control_mac_deny(struct mac_restrictions *mac_restrictions,
 
         spin_lock_bh(&mac_restrictions->lock);
         list_for_each_entry(entry, &mac_restrictions->mac_list, list) {
-                if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
+                if (ether_addr_equal(entry->addr, mac)) {
                         found = 1;
                         break;
                 }
@@ -957,7 +957,7 @@ static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta)
         struct sta_info *s;
 
         s = ap->sta_hash[STA_HASH(sta)];
-        while (s != NULL && memcmp(s->addr, sta, ETH_ALEN) != 0)
+        while (s != NULL && !ether_addr_equal(s->addr, sta))
                 s = s->hnext;
         return s;
 }
@@ -1391,7 +1391,7 @@ static void handle_authen(local_info_t *local, struct sk_buff *skb,
         status_code = __le16_to_cpu(*pos);
         pos++;
 
-        if (memcmp(dev->dev_addr, hdr->addr2, ETH_ALEN) == 0 ||
+        if (ether_addr_equal(dev->dev_addr, hdr->addr2) ||
             ap_control_mac_deny(&ap->mac_restrictions, hdr->addr2)) {
                 txt = "authentication denied";
                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
@@ -1935,7 +1935,7 @@ static void handle_pspoll(local_info_t *local,
         PDEBUG(DEBUG_PS2, "handle_pspoll: BSSID=%pM, TA=%pM PWRMGT=%d\n",
                hdr->addr1, hdr->addr2, !!ieee80211_has_pm(hdr->frame_control));
 
-        if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
+        if (!ether_addr_equal(hdr->addr1, dev->dev_addr)) {
                 PDEBUG(DEBUG_AP,
                        "handle_pspoll - addr1(BSSID)=%pM not own MAC\n",
                        hdr->addr1);
@@ -2230,7 +2230,7 @@ static void handle_ap_item(local_info_t *local, struct sk_buff *skb,
                         goto done;
                 }
 
-                if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
+                if (!ether_addr_equal(hdr->addr1, dev->dev_addr)) {
                         PDEBUG(DEBUG_AP, "handle_ap_item - addr1(BSSID)=%pM"
                                " not own MAC\n", hdr->addr1);
                         goto done;
@@ -2267,13 +2267,13 @@ static void handle_ap_item(local_info_t *local, struct sk_buff *skb,
                 goto done;
         }
 
-        if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
+        if (!ether_addr_equal(hdr->addr1, dev->dev_addr)) {
                 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(DA)=%pM"
                        " not own MAC\n", hdr->addr1);
                 goto done;
         }
 
-        if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN)) {
+        if (!ether_addr_equal(hdr->addr3, dev->dev_addr)) {
                 PDEBUG(DEBUG_AP, "handle_ap_item - addr3(BSSID)=%pM"
                        " not own MAC\n", hdr->addr3);
                 goto done;
@@ -3035,7 +3035,7 @@ ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
                 if (!wds) {
                         /* FromDS frame - not for us; probably
                          * broadcast/multicast in another BSS - drop */
-                        if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
+                        if (ether_addr_equal(hdr->addr1, dev->dev_addr)) {
                                 printk(KERN_DEBUG "Odd.. FromDS packet "
                                        "received with own BSSID\n");
                                 hostap_dump_rx_80211(dev->name, skb, rx_stats);
@@ -3044,7 +3044,7 @@ ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
                         goto out;
                 }
         } else if (stype == IEEE80211_STYPE_NULLFUNC && sta == NULL &&
-                   memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
+                   ether_addr_equal(hdr->addr1, dev->dev_addr)) {
 
                 if (local->hostapd) {
                         prism2_rx_80211(local->apdev, skb, rx_stats,
@@ -3073,7 +3073,7 @@ ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
                 /* If BSSID (Addr3) is foreign, this frame is a normal
                  * broadcast frame from an IBSS network. Drop it silently.
                  * If BSSID is own, report the dropping of this frame. */
-                if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
+                if (ether_addr_equal(hdr->addr3, dev->dev_addr)) {
                         printk(KERN_DEBUG "%s: dropped received packet from %pM"
                                " with no ToDS flag "
                                "(type=0x%02x, subtype=0x%02x)\n", dev->name,
diff --git a/drivers/net/wireless/hostap/hostap_hw.c b/drivers/net/wireless/hostap/hostap_hw.c
index c275dc1623fe..6df3ee561d52 100644
--- a/drivers/net/wireless/hostap/hostap_hw.c
+++ b/drivers/net/wireless/hostap/hostap_hw.c
@@ -2175,7 +2175,7 @@ static void hostap_tx_callback(local_info_t *local,
         struct hostap_tx_callback_info *cb;
 
         /* Make sure that frame was from us. */
-        if (memcmp(txdesc->addr2, local->dev->dev_addr, ETH_ALEN)) {
+        if (!ether_addr_equal(txdesc->addr2, local->dev->dev_addr)) {
                 printk(KERN_DEBUG "%s: TX callback - foreign frame\n",
                        local->dev->name);
                 return;
diff --git a/drivers/net/wireless/hostap/hostap_ioctl.c b/drivers/net/wireless/hostap/hostap_ioctl.c
index e5090309824e..2454a740ea50 100644
--- a/drivers/net/wireless/hostap/hostap_ioctl.c
+++ b/drivers/net/wireless/hostap/hostap_ioctl.c
@@ -655,7 +655,7 @@ static int hostap_join_ap(struct net_device *dev)
                 if (!local->last_scan_results)
                         break;
                 entry = &local->last_scan_results[i];
-                if (memcmp(local->preferred_ap, entry->bssid, ETH_ALEN) == 0) {
+                if (ether_addr_equal(local->preferred_ap, entry->bssid)) {
                         req.channel = entry->chid;
                         break;
                 }
@@ -1978,7 +1978,7 @@ static inline int prism2_translate_scan(local_info_t *local,
                 list_for_each(ptr, &local->bss_list) {
                         struct hostap_bss_info *bss;
                         bss = list_entry(ptr, struct hostap_bss_info, list);
-                        if (memcmp(bss->bssid, scan->bssid, ETH_ALEN) == 0) {
+                        if (ether_addr_equal(bss->bssid, scan->bssid)) {
                                 bss->included = 1;
                                 current_ev = __prism2_translate_scan(
                                         local, info, scan, bss, current_ev,
diff --git a/drivers/net/wireless/hostap/hostap_main.c b/drivers/net/wireless/hostap/hostap_main.c
index a1257c92afc4..67db34e56d7e 100644
--- a/drivers/net/wireless/hostap/hostap_main.c
+++ b/drivers/net/wireless/hostap/hostap_main.c
@@ -155,8 +155,7 @@ int prism2_wds_add(local_info_t *local, u8 *remote_addr,
 
                 if (prism2_wds_special_addr(iface->u.wds.remote_addr))
                         empty = iface;
-                else if (memcmp(iface->u.wds.remote_addr, remote_addr,
-                                ETH_ALEN) == 0) {
+                else if (ether_addr_equal(iface->u.wds.remote_addr, remote_addr)) {
                         match = iface;
                         break;
                 }
@@ -214,8 +213,7 @@ int prism2_wds_del(local_info_t *local, u8 *remote_addr,
                 if (iface->type != HOSTAP_INTERFACE_WDS)
                         continue;
 
-                if (memcmp(iface->u.wds.remote_addr, remote_addr,
-                           ETH_ALEN) == 0) {
+                if (ether_addr_equal(iface->u.wds.remote_addr, remote_addr)) {
                         selected = iface;
                         break;
                 }
@@ -1085,7 +1083,7 @@ int prism2_sta_deauth(local_info_t *local, u16 reason)
 
         if (local->iw_mode != IW_MODE_INFRA ||
             is_zero_ether_addr(local->bssid) ||
-            memcmp(local->bssid, "\x44\x44\x44\x44\x44\x44", ETH_ALEN) == 0)
+            ether_addr_equal(local->bssid, "\x44\x44\x44\x44\x44\x44"))
                 return 0;
 
         ret = prism2_sta_send_mgmt(local, local->bssid, IEEE80211_STYPE_DEAUTH,