From: Felix Fietkau <nbd@openwrt.org>
Date: Wed, 8 Feb 2012 18:17:11 +0000 (+0100)
Subject: mac80211: do not call rate control .tx_status before .rate_init
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=216c57b214bd621335ff698b475f6db2802502dc;p=linux-beck.git

mac80211: do not call rate control .tx_status before .rate_init

Most rate control implementations assume .get_rate and .tx_status are only
called once the per-station data has been fully initialized.
minstrel_ht crashes if this assumption is violated.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Tested-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/net/mac80211/rate.h b/net/mac80211/rate.h
index 2b83f32144fd..80cfc006dd74 100644
--- a/net/mac80211/rate.h
+++ b/net/mac80211/rate.h
@@ -41,7 +41,7 @@ static inline void rate_control_tx_status(struct ieee80211_local *local,
 	struct ieee80211_sta *ista = &sta->sta;
 	void *priv_sta = sta->rate_ctrl_priv;
 
-	if (!ref)
+	if (!ref || !test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
 		return;
 
 	ref->ops->tx_status(ref->priv, sband, ista, priv_sta, skb);