mac80211: add rate control rewrite and enhance the performance of the minstrel algorithm for non-mrr configurations

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@12948 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 113 insertions, 0 deletions

diff --git a/package/mac80211/patches/412-mac80211-warn-ieee80211_hw_config-failure.patch b/package/mac80211/patches/412-mac80211-warn-ieee80211_hw_config-failure.patch
new file mode 100644
index 000000000..f18569b93
--- /dev/null
+++ b/package/mac80211/patches/412-mac80211-warn-ieee80211_hw_config-failure.patch
@@ -0,0 +1,113 @@
+Subject: mac80211: clean up ieee80211_hw_config errors
+
+Warn when ieee80211_hw_config returns an error, it shouldn't
+happen; remove a number of printks that would happen in such
+a case and one printk that is user-triggerable.
+
+Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
+---
+ net/mac80211/cfg.c  |    3 +--
+ net/mac80211/main.c |    8 +++++++-
+ net/mac80211/scan.c |   16 +++-------------
+ net/mac80211/util.c |    5 +----
+ net/mac80211/wext.c |    6 +-----
+ 5 files changed, 13 insertions(+), 25 deletions(-)
+
+--- everything.orig/net/mac80211/cfg.c	2008-10-07 20:06:42.000000000 +0200
++++ everything/net/mac80211/cfg.c	2008-10-07 20:06:43.000000000 +0200
+@@ -396,8 +396,7 @@ static int ieee80211_config_beacon(struc
+ 	 */
+ 	if (params->interval) {
+ 		sdata->local->hw.conf.beacon_int = params->interval;
+-		if (ieee80211_hw_config(sdata->local))
+-			return -EINVAL;
++		ieee80211_hw_config(sdata->local);
+ 		/*
+ 		 * We updated some parameter so if below bails out
+ 		 * it's not an error.
+--- everything.orig/net/mac80211/main.c	2008-10-07 20:06:41.000000000 +0200
++++ everything/net/mac80211/main.c	2008-10-07 20:06:43.000000000 +0200
+@@ -222,8 +222,14 @@ int ieee80211_hw_config(struct ieee80211
+ 	       wiphy_name(local->hw.wiphy), chan->center_freq);
+ #endif
+ 
+-	if (local->open_count)
++	if (local->open_count) {
+ 		ret = local->ops->config(local_to_hw(local), &local->hw.conf);
++		/*
++		 * HW reconfiguration should never fail, the driver has told
++		 * us what it can support so it should live up to that promise.
++		 */
++		WARN_ON(ret);
++	}
+ 
+ 	return ret;
+ }
+--- everything.orig/net/mac80211/scan.c	2008-10-07 20:05:27.000000000 +0200
++++ everything/net/mac80211/scan.c	2008-10-07 20:06:43.000000000 +0200
+@@ -447,18 +447,12 @@ void ieee80211_scan_completed(struct iee
+ 
+ 	if (local->hw_scanning) {
+ 		local->hw_scanning = false;
+-		if (ieee80211_hw_config(local))
+-			printk(KERN_DEBUG "%s: failed to restore operational "
+-			       "channel after scan\n", wiphy_name(local->hw.wiphy));
+-
++		ieee80211_hw_config(local);
+ 		goto done;
+ 	}
+ 
+ 	local->sw_scanning = false;
+-	if (ieee80211_hw_config(local))
+-		printk(KERN_DEBUG "%s: failed to restore operational "
+-		       "channel after scan\n", wiphy_name(local->hw.wiphy));
+-
++	ieee80211_hw_config(local);
+ 
+ 	netif_tx_lock_bh(local->mdev);
+ 	netif_addr_lock(local->mdev);
+@@ -545,12 +539,8 @@ void ieee80211_scan_work(struct work_str
+ 
+ 		if (!skip) {
+ 			local->scan_channel = chan;
+-			if (ieee80211_hw_config(local)) {
+-				printk(KERN_DEBUG "%s: failed to set freq to "
+-				       "%d MHz for scan\n", wiphy_name(local->hw.wiphy),
+-				       chan->center_freq);
++			if (ieee80211_hw_config(local))
+ 				skip = 1;
+-			}
+ 		}
+ 
+ 		/* advance state machine to next channel/band */
+--- everything.orig/net/mac80211/util.c	2008-10-07 20:05:27.000000000 +0200
++++ everything/net/mac80211/util.c	2008-10-07 20:06:43.000000000 +0200
+@@ -638,11 +638,8 @@ int ieee80211_set_freq(struct ieee80211_
+ 
+ 	if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
+ 		if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
+-		    chan->flags & IEEE80211_CHAN_NO_IBSS) {
+-			printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
+-				"%d MHz\n", sdata->dev->name, chan->center_freq);
++		    chan->flags & IEEE80211_CHAN_NO_IBSS)
+ 			return ret;
+-		}
+ 		local->oper_channel = chan;
+ 
+ 		if (local->sw_scanning || local->hw_scanning)
+--- everything.orig/net/mac80211/wext.c	2008-10-07 20:05:27.000000000 +0200
++++ everything/net/mac80211/wext.c	2008-10-07 20:06:43.000000000 +0200
+@@ -689,12 +689,8 @@ static int ieee80211_ioctl_siwtxpower(st
+ 		ieee80211_led_radio(local, local->hw.conf.radio_enabled);
+ 	}
+ 
+-	if (need_reconfig) {
++	if (need_reconfig)
+ 		ieee80211_hw_config(local);
+-		/* The return value of hw_config is not of big interest here,
+-		 * as it doesn't say that it failed because of _this_ config
+-		 * change or something else. Ignore it. */
+-	}
+ 
+ 	return 0;
+ }