mac80211: remove tx_frags driver callback

The implementation of tx_frags is buggy due to
not handling queue stop, and there's no driver
implementing it so remove it.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

4 files changed, 3 insertions, 29 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index b5da094468f1..dc2a97af95e7 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1896,19 +1896,6 @@ enum ieee80211_rate_control_changed {
  *      The low-level driver should send the frame out based on
  *      configuration in the TX control data. This handler should,
  *      preferably, never fail and stop queues appropriately.
- *      This must be implemented if @tx_frags is not.
- *      Must be atomic.
- *
- * @tx_frags: Called to transmit multiple fragments of a single MSDU.
- *      This handler must consume all fragments, sending out some of
- *      them only is useless and it can't ask for some of them to be
- *      queued again. If the frame is not fragmented the queue has a
- *      single SKB only. To avoid issues with the networking stack
- *      when TX status is reported the frames should be removed from
- *      the skb queue.
- *      If this is used, the tx_info @vif and @sta pointers will be
- *      invalid -- you must not use them in that case.
- *      This must be implemented if @tx isn't.
  *      Must be atomic.
  *
  * @start: Called before the first netdevice attached to the hardware
@@ -2260,8 +2247,6 @@ enum ieee80211_rate_control_changed {
  */
 struct ieee80211_ops {
         void (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb);
-        void (*tx_frags)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
-                         struct ieee80211_sta *sta, struct sk_buff_head *skbs);
         int (*start)(struct ieee80211_hw *hw);
         void (*stop)(struct ieee80211_hw *hw);
 #ifdef CONFIG_PM
diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h
index 44e8c1242781..5042151a3325 100644
--- a/net/mac80211/driver-ops.h
+++ b/net/mac80211/driver-ops.h
@@ -27,14 +27,6 @@ static inline void drv_tx(struct ieee80211_local *local, struct sk_buff *skb)
         local->ops->tx(&local->hw, skb);
 }
 
-static inline void drv_tx_frags(struct ieee80211_local *local,
-                                struct ieee80211_vif *vif,
-                                struct ieee80211_sta *sta,
-                                struct sk_buff_head *skbs)
-{
-        local->ops->tx_frags(&local->hw, vif, sta, skbs);
-}
-
 static inline void drv_get_et_strings(struct ieee80211_sub_if_data *sdata,
                                       u32 sset, u8 *data)
 {
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index ab32c59be894..c794101f8987 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -587,7 +587,7 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
 
         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
 
-        BUG_ON(!ops->tx && !ops->tx_frags);
+        BUG_ON(!ops->tx);
         BUG_ON(!ops->start);
         BUG_ON(!ops->stop);
         BUG_ON(!ops->config);
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 4990f4fb5864..364a1e7b4afa 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1295,11 +1295,8 @@ static bool __ieee80211_tx(struct ieee80211_local *local,
                 break;
         }
 
-        if (local->ops->tx_frags)
-                drv_tx_frags(local, vif, pubsta, skbs);
-        else
-                result = ieee80211_tx_frags(local, vif, pubsta, skbs,
-                                            txpending);
+        result = ieee80211_tx_frags(local, vif, pubsta, skbs,
+                                    txpending);
 
         ieee80211_tpt_led_trig_tx(local, fc, led_len);
         ieee80211_led_tx(local, 1);