rt2x00: Determine MY_BSS from descriptor

Use the MY_BSS descriptor field to determine if the
received frame belongs to the same BSS as the interface.
This can be used by rxdone to determine if the frame
should be updated or not.
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2400pci.c

@@ -1117,6 +1117,7 @@ static void rt2400pci_fill_rxdone(struct data_entry *entry,
 	    entry->ring->rt2x00dev->rssi_offset;
 	desc->ofdm = 0;
 	desc->size = rt2x00_get_field32(word0, RXD_W0_DATABYTE_COUNT);
+	desc->my_bss = !!rt2x00_get_field32(word0, RXD_W0_MY_BSS);
 }
 
 /*

drivers/net/wireless/rt2x00/rt2500pci.c

@@ -1264,6 +1264,7 @@ static void rt2500pci_fill_rxdone(struct data_entry *entry,
 	    entry->ring->rt2x00dev->rssi_offset;
 	desc->ofdm = rt2x00_get_field32(word0, RXD_W0_OFDM);
 	desc->size = rt2x00_get_field32(word0, RXD_W0_DATABYTE_COUNT);
+	desc->my_bss = !!rt2x00_get_field32(word0, RXD_W0_MY_BSS);
 }
 
 /*

drivers/net/wireless/rt2x00/rt2500usb.c

@@ -1138,8 +1138,7 @@ static void rt2500usb_fill_rxdone(struct data_entry *entry,
 	    entry->ring->rt2x00dev->rssi_offset;
 	desc->ofdm = rt2x00_get_field32(word0, RXD_W0_OFDM);
 	desc->size = rt2x00_get_field32(word0, RXD_W0_DATABYTE_COUNT);
-
-	return;
+	desc->my_bss = !!rt2x00_get_field32(word0, RXD_W0_MY_BSS);
 }
 
 /*

drivers/net/wireless/rt2x00/rt2x00dev.c

@@ -526,7 +526,6 @@ void rt2x00lib_rxdone(struct data_entry *entry, struct sk_buff *skb,
 		      struct rxdata_entry_desc *desc)
 {
 	struct rt2x00_dev *rt2x00dev = entry->ring->rt2x00dev;
-	struct interface *intf = &rt2x00dev->interface;
 	struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
 	struct ieee80211_hw_mode *mode;
 	struct ieee80211_rate *rate;
@@ -559,19 +558,12 @@ void rt2x00lib_rxdone(struct data_entry *entry, struct sk_buff *skb,
 	}
 
 	/*
-	 * Only update link status if this is a beacon frame carrying our
-	 * bssid.
+	 * Only update link status if this is a beacon frame carrying our bssid.
 	 */
-	hdr = (struct ieee80211_hdr *) skb->data;
-	if (skb->len >= sizeof(struct ieee80211_hdr *)) {
-		fc = le16_to_cpu(hdr->frame_control);
-		if ((intf->type == IEEE80211_IF_TYPE_STA
-		     || intf->type == IEEE80211_IF_TYPE_IBSS)
-		    && is_beacon(fc)
-		    && compare_ether_addr(hdr->addr3, intf->bssid) == 0)
-			rt2x00lib_update_link_stats(&rt2x00dev->link,
-						    desc->rssi);
-	}
+	hdr = (struct ieee80211_hdr*)skb->data;
+	fc = le16_to_cpu(hdr->frame_control);
+	if (is_beacon(fc) && desc->my_bss)
+		rt2x00lib_update_link_stats(&rt2x00dev->link, desc->rssi);
 
 	rt2x00dev->link.qual.rx_success++;
 

drivers/net/wireless/rt2x00/rt2x00ring.h

@@ -59,6 +59,7 @@ struct rxdata_entry_desc {
 	int ofdm;
 	int size;
 	int flags;
+	int my_bss;
 };
 
 /*

drivers/net/wireless/rt2x00/rt61pci.c

@@ -1695,8 +1695,7 @@ static void rt61pci_fill_rxdone(struct data_entry *entry,
 	desc->rssi = rt61pci_agc_to_rssi(entry->ring->rt2x00dev, word1);
 	desc->ofdm = rt2x00_get_field32(word0, RXD_W0_OFDM);
 	desc->size = rt2x00_get_field32(word0, RXD_W0_DATABYTE_COUNT);
-
-	return;
+	desc->my_bss = !!rt2x00_get_field32(word0, RXD_W0_MY_BSS);
 }
 
 /*

drivers/net/wireless/rt2x00/rt73usb.c

@@ -1396,13 +1396,12 @@ static void rt73usb_fill_rxdone(struct data_entry *entry,
 	desc->rssi = rt73usb_agc_to_rssi(entry->ring->rt2x00dev, word1);
 	desc->ofdm = rt2x00_get_field32(word0, RXD_W0_OFDM);
 	desc->size = rt2x00_get_field32(word0, RXD_W0_DATABYTE_COUNT);
+	desc->my_bss = !!rt2x00_get_field32(word0, RXD_W0_MY_BSS);
 
 	/*
 	 * Pull the skb to clear the descriptor area.
 	 */
 	skb_pull(entry->skb, entry->ring->desc_size);
-
-	return;
 }
 
 /*