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[PATCH] mac80211: print info when disabling HT

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From: Johannes Berg <johannes.berg@xxxxxxxxx>

Make mac80211 print a message when it disables
HT due to the connection using WEP/TKIP or due
to the AP not supporting WMM/QoS.

Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
---
 net/mac80211/mlme.c |   13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

--- a/net/mac80211/mlme.c	2012-05-30 10:39:53.000000000 +0200
+++ b/net/mac80211/mlme.c	2012-05-30 13:54:29.000000000 +0200
@@ -3326,11 +3326,15 @@ int ieee80211_mgd_assoc(struct ieee80211
 	 * We can set this to true for non-11n hardware, that'll be checked
 	 * separately along with the peer capabilities.
 	 */
-	for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
+	for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
 		if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
 		    req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
-		    req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
+		    req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
 			ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
+			netdev_printk(KERN_INFO, sdata->dev,
+				      "disabling HT due to WEP/TKIP use\n");
+		}
+	}
 
 	if (req->flags & ASSOC_REQ_DISABLE_HT)
 		ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
@@ -3338,8 +3342,11 @@ int ieee80211_mgd_assoc(struct ieee80211
 	/* Also disable HT if we don't support it or the AP doesn't use WMM */
 	sband = local->hw.wiphy->bands[req->bss->channel->band];
 	if (!sband->ht_cap.ht_supported ||
-	    local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used)
+	    local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
 		ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
+		netdev_printk(KERN_INFO, sdata->dev,
+			      "disabling HT as WMM/QoS is not supported\n");
+	}
 
 	memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
 	memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,


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