mac80211: use offchannel queue only when supported

Commit 3a25a8c ("mac80211: add improved HW queue control")
added support for offchannel queue mapping. However, this
mapping is only valid when the driver supports
IEEE80211_HW_QUEUE_CONTROL.

Check whether the driver supports IEEE80211_HW_QUEUE_CONTROL
before setting the hw_queue to the mapped offchannel queue.

(This patch doesn't have any actual effect, because
hw_queue is overridden in ieee80211_tx() anyway,
so this is merely some cleanup)

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

1 files changed, 5 insertions, 3 deletions

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 495831ee48f1..7ad542363f0b 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -2304,7 +2304,8 @@ static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct net_device *dev,
 
         IEEE80211_SKB_CB(skb)->flags = flags;
 
-        if (flags & IEEE80211_TX_CTL_TX_OFFCHAN)
+        if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL &&
+            flags & IEEE80211_TX_CTL_TX_OFFCHAN)
                 IEEE80211_SKB_CB(skb)->hw_queue =
                         local->hw.offchannel_tx_hw_queue;
 
@@ -2349,8 +2350,9 @@ static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct net_device *dev,
                 /* modify cookie to prevent API mismatches */
                 *cookie ^= 2;
                 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_TX_OFFCHAN;
-                IEEE80211_SKB_CB(skb)->hw_queue =
-                        local->hw.offchannel_tx_hw_queue;
+                if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
+                        IEEE80211_SKB_CB(skb)->hw_queue =
+                                local->hw.offchannel_tx_hw_queue;
                 local->hw_roc_skb = skb;
                 local->hw_roc_skb_for_status = skb;
                 mutex_unlock(&local->mtx);