mac80211: do not fragment while aggregation is in use

This patch denies the use of framentation while ampdu is used.

Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 1ad9e66..195cb6d 100644 (file)
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -660,9 +660,8 @@ ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
 
        /*
         * Warn when submitting a fragmented A-MPDU frame and drop it.
-        * This is an error and needs to be fixed elsewhere, but when
-        * done needs to take care of monitor interfaces (injection)
-        * etc.
+        * This scenario is handled in __ieee80211_tx_prepare but extra
+        * caution taken here as fragmented ampdu may cause Tx stop.
         */
        if (WARN_ON(tx->flags & IEEE80211_TX_CTL_AMPDU ||
                    skb_get_queue_mapping(tx->skb) >=
@@ -981,7 +980,8 @@ __ieee80211_tx_prepare(struct ieee80211_tx_data *tx,
        if (tx->flags & IEEE80211_TX_FRAGMENTED) {
                if ((tx->flags & IEEE80211_TX_UNICAST) &&
                    skb->len + FCS_LEN > local->fragmentation_threshold &&
-                   !local->ops->set_frag_threshold)
+                   !local->ops->set_frag_threshold &&
+                   !(info->flags & IEEE80211_TX_CTL_AMPDU))
                        tx->flags |= IEEE80211_TX_FRAGMENTED;
                else
                        tx->flags &= ~IEEE80211_TX_FRAGMENTED;