mac80211: allow driver to ask for a rate control algorithm

This allows a driver to ask for a specific rate control algorithm.
The rate control algorithm asked for must be registered and be
available as a module or built-in.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 5fcc4c1..f13c378 100644 (file)
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -706,11 +706,16 @@ enum ieee80211_hw_flags {
  *
  * @queues: number of available hardware transmit queues for
  *     data packets. WMM/QoS requires at least four.
+ *
+ * @rate_control_algorithm: rate control algorithm for this hardware.
+ *     If unset (NULL), the default algorithm will be used. Must be
+ *     set before calling ieee80211_register_hw().
  */
 struct ieee80211_hw {
        struct ieee80211_conf conf;
        struct wiphy *wiphy;
        struct workqueue_struct *workqueue;
+       const char *rate_control_algorithm;
        void *priv;
        u32 flags;
        unsigned int extra_tx_headroom;

diff --git a/net/mac80211/ieee80211.c b/net/mac80211/ieee80211.c
index 52ba6ef..e0ee65a 100644 (file)
--- a/net/mac80211/ieee80211.c
+++ b/net/mac80211/ieee80211.c
@@ -1072,7 +1072,8 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
        ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
        ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
 
-       result = ieee80211_init_rate_ctrl_alg(local, NULL);
+       result = ieee80211_init_rate_ctrl_alg(local,
+                                             hw->rate_control_algorithm);
        if (result < 0) {
                printk(KERN_DEBUG "%s: Failed to initialize rate control "
                       "algorithm\n", wiphy_name(local->hw.wiphy));