mac80211: make "decrypt failed" messages conditional upon MAC80211_DEBUG

Make "decrypt failed" and "have no key" debugging messages compile
conditionally upon CONFIG_MAC80211_DEBUG.  They have been useful for
finding certain problems in the past, but in many cases they just
clutter a user's logs.

A typical example is an enviornment where multiple SSIDs are using a
single BSSID but with different protection schemes or different keys
for each SSID.  In such an environment these messages are just noise.
Let's just leave them for those interested enough to turn-on debugging.
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/mac80211/rx.c

@@ -509,9 +509,11 @@ ieee80211_rx_h_decrypt(struct ieee80211_txrx_data *rx)
 		rx->key->tx_rx_count++;
 		/* TODO: add threshold stuff again */
 	} else {
+#ifdef CONFIG_MAC80211_DEBUG
 		if (net_ratelimit())
 			printk(KERN_DEBUG "%s: RX protected frame,"
 			       " but have no key\n", rx->dev->name);
+#endif /* CONFIG_MAC80211_DEBUG */
 		return TXRX_DROP;
 	}
 

net/mac80211/wep.c

@@ -314,9 +314,11 @@ ieee80211_crypto_wep_decrypt(struct ieee80211_txrx_data *rx)
 
 	if (!(rx->u.rx.status->flag & RX_FLAG_DECRYPTED)) {
 		if (ieee80211_wep_decrypt(rx->local, rx->skb, rx->key)) {
+#ifdef CONFIG_MAC80211_DEBUG
 			if (net_ratelimit())
 				printk(KERN_DEBUG "%s: RX WEP frame, decrypt "
 				       "failed\n", rx->dev->name);
+#endif /* CONFIG_MAC80211_DEBUG */
 			return TXRX_DROP;
 		}
 	} else if (!(rx->u.rx.status->flag & RX_FLAG_IV_STRIPPED)) {

net/mac80211/wpa.c

@@ -323,9 +323,12 @@ ieee80211_crypto_tkip_decrypt(struct ieee80211_txrx_data *rx)
 					  &rx->u.rx.tkip_iv32,
 					  &rx->u.rx.tkip_iv16);
 	if (res != TKIP_DECRYPT_OK || wpa_test) {
-		printk(KERN_DEBUG "%s: TKIP decrypt failed for RX frame from "
-		       "%s (res=%d)\n",
-		       rx->dev->name, print_mac(mac, rx->sta->addr), res);
+#ifdef CONFIG_MAC80211_DEBUG
+		if (net_ratelimit())
+			printk(KERN_DEBUG "%s: TKIP decrypt failed for RX "
+			       "frame from %s (res=%d)\n", rx->dev->name,
+			       print_mac(mac, rx->sta->addr), res);
+#endif /* CONFIG_MAC80211_DEBUG */
 		return TXRX_DROP;
 	}
 
@@ -594,9 +597,12 @@ ieee80211_crypto_ccmp_decrypt(struct ieee80211_txrx_data *rx)
 			    skb->data + hdrlen + CCMP_HDR_LEN, data_len,
 			    skb->data + skb->len - CCMP_MIC_LEN,
 			    skb->data + hdrlen + CCMP_HDR_LEN)) {
-			printk(KERN_DEBUG "%s: CCMP decrypt failed for RX "
-			       "frame from %s\n", rx->dev->name,
+#ifdef CONFIG_MAC80211_DEBUG
+			if (net_ratelimit())
+				printk(KERN_DEBUG "%s: CCMP decrypt failed "
+				       "for RX frame from %s\n", rx->dev->name,
 				       print_mac(mac, rx->sta->addr));
+#endif /* CONFIG_MAC80211_DEBUG */
 			return TXRX_DROP;
 		}
 	}