mac80211: add PID controller based rate control algorithm
Add a new rate control algorithm based on a PID controller. It samples the
percentage of failed frames over time, feeds the result into the controller and
uses its output to control the TX rate.
Signed-off-by: Mattias Nissler <mattias.nissler@gmx.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/mac80211/ieee80211.c b/net/mac80211/ieee80211.c
index 5bf7a5b..3d7b434 100644
--- a/net/mac80211/ieee80211.c
+++ b/net/mac80211/ieee80211.c
@@ -1315,23 +1315,37 @@
#ifdef CONFIG_MAC80211_RCSIMPLE
ret = ieee80211_rate_control_register(&mac80211_rcsimple);
if (ret)
- return ret;
+ goto fail;
+#endif
+
+#ifdef CONFIG_MAC80211_RCPID
+ ret = ieee80211_rate_control_register(&mac80211_rcpid);
+ if (ret)
+ goto fail;
#endif
ret = ieee80211_wme_register();
if (ret) {
-#ifdef CONFIG_MAC80211_RCSIMPLE
- ieee80211_rate_control_unregister(&mac80211_rcsimple);
-#endif
printk(KERN_DEBUG "ieee80211_init: failed to "
"initialize WME (err=%d)\n", ret);
- return ret;
+ goto fail;
}
ieee80211_debugfs_netdev_init();
ieee80211_regdomain_init();
return 0;
+
+fail:
+
+#ifdef CONFIG_MAC80211_RCSIMPLE
+ ieee80211_rate_control_unregister(&mac80211_rcsimple);
+#endif
+#ifdef CONFIG_MAC80211_RCPID
+ ieee80211_rate_control_unregister(&mac80211_rcpid);
+#endif
+
+ return ret;
}
static void __exit ieee80211_exit(void)
@@ -1339,6 +1353,9 @@
#ifdef CONFIG_MAC80211_RCSIMPLE
ieee80211_rate_control_unregister(&mac80211_rcsimple);
#endif
+#ifdef CONFIG_MAC80211_RCPID
+ ieee80211_rate_control_unregister(&mac80211_rcpid);
+#endif
ieee80211_wme_unregister();
ieee80211_debugfs_netdev_exit();