1 files changed, 30 insertions, 1 deletions

diff --git a/net/mac80211/rate.c b/net/mac80211/rate.c
index 4641f00a1e5c..b33efc4fc267 100644
--- a/net/mac80211/rate.c
+++ b/net/mac80211/rate.c
@@ -198,6 +198,35 @@ static void rate_control_release(struct kref *kref)
         kfree(ctrl_ref);
 }
 
+static bool rc_no_data_or_no_ack(struct ieee80211_tx_rate_control *txrc)
+{
+        struct sk_buff *skb = txrc->skb;
+        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+        struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+        __le16 fc;
+
+        fc = hdr->frame_control;
+
+        return ((info->flags & IEEE80211_TX_CTL_NO_ACK) || !ieee80211_is_data(fc));
+}
+
+bool rate_control_send_low(struct ieee80211_sta *sta,
+                           void *priv_sta,
+                           struct ieee80211_tx_rate_control *txrc)
+{
+        struct ieee80211_tx_info *info = IEEE80211_SKB_CB(txrc->skb);
+
+        if (!sta || !priv_sta || rc_no_data_or_no_ack(txrc)) {
+                info->control.rates[0].idx = rate_lowest_index(txrc->sband, sta);
+                info->control.rates[0].count =
+                        (info->flags & IEEE80211_TX_CTL_NO_ACK) ?
+                        1 : txrc->hw->max_rate_tries;
+                return true;
+        }
+        return false;
+}
+EXPORT_SYMBOL(rate_control_send_low);
+
 void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
                            struct sta_info *sta,
                            struct ieee80211_tx_rate_control *txrc)
@@ -258,7 +287,7 @@ int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
         struct rate_control_ref *ref, *old;
 
         ASSERT_RTNL();
-        if (local->open_count || netif_running(local->mdev))
+        if (local->open_count)
                 return -EBUSY;
 
         ref = rate_control_alloc(name, local);