From: Amitkumar Karwar <akarwar@marvell.com>
Date: Thu, 21 Apr 2011 21:10:27 +0000 (-0700)
Subject: cfg80211: module_param to disable HT40 in 2.4GHz band
X-Git-Tag: MMI-PSA29.97-13-9~19291^2~16^2~289
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=40db6c77ab48c3f3240422ff92fd6da222e2eb95;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git

cfg80211: module_param to disable HT40 in 2.4GHz band

Currently mac80211 uses ieee80211_disable_40mhz_24ghz module
parameter to allow disabling 40MHz operation in the 2.4GHz band.
Move this handling from mac80211 to cfg80211 so that the feature
will be more generic.

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 0ab2a8df312d..61877662e8f8 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -33,12 +33,6 @@
 #include "cfg.h"
 #include "debugfs.h"
 
-
-static bool ieee80211_disable_40mhz_24ghz;
-module_param(ieee80211_disable_40mhz_24ghz, bool, 0644);
-MODULE_PARM_DESC(ieee80211_disable_40mhz_24ghz,
-		 "Disable 40MHz support in the 2.4GHz band");
-
 static struct lock_class_key ieee80211_rx_skb_queue_class;
 
 void ieee80211_configure_filter(struct ieee80211_local *local)
@@ -728,18 +722,6 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
 		}
 		channels += sband->n_channels;
 
-		/*
-		 * Since ieee80211_disable_40mhz_24ghz is global, we can
-		 * modify the sband's ht data even if the driver uses a
-		 * global structure for that.
-		 */
-		if (ieee80211_disable_40mhz_24ghz &&
-		    band == IEEE80211_BAND_2GHZ &&
-		    sband->ht_cap.ht_supported) {
-			sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
-			sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
-		}
-
 		if (max_bitrates < sband->n_bitrates)
 			max_bitrates = sband->n_bitrates;
 		supp_ht = supp_ht || sband->ht_cap.ht_supported;
diff --git a/net/wireless/core.c b/net/wireless/core.c
index fe01de29bfe8..bbf1fa11107a 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -46,6 +46,11 @@ static struct dentry *ieee80211_debugfs_dir;
 /* for the cleanup, scan and event works */
 struct workqueue_struct *cfg80211_wq;
 
+static bool cfg80211_disable_40mhz_24ghz;
+module_param(cfg80211_disable_40mhz_24ghz, bool, 0644);
+MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz,
+		 "Disable 40MHz support in the 2.4GHz band");
+
 /* requires cfg80211_mutex to be held! */
 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
 {
@@ -450,6 +455,18 @@ int wiphy_register(struct wiphy *wiphy)
 		if (WARN_ON(!sband->n_channels || !sband->n_bitrates))
 			return -EINVAL;
 
+		/*
+		 * Since cfg80211_disable_40mhz_24ghz is global, we can
+		 * modify the sband's ht data even if the driver uses a
+		 * global structure for that.
+		 */
+		if (cfg80211_disable_40mhz_24ghz &&
+		    band == IEEE80211_BAND_2GHZ &&
+		    sband->ht_cap.ht_supported) {
+			sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
+			sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
+		}
+
 		/*
 		 * Since we use a u32 for rate bitmaps in
 		 * ieee80211_get_response_rate, we cannot