Patch "mac80211: don't handle filtered frames within a BA session" has been added to the 4.9-stable tree

This is a note to let you know that I've just added the patch titled

mac80211: don't handle filtered frames within a BA session

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
mac80211-don-t-handle-filtered-frames-within-a-ba-session.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Felix Fietkau <[email protected]>
Date: Wed, 22 Feb 2017 16:16:07 +0100
Subject: mac80211: don't handle filtered frames within a BA session

From: Felix Fietkau <[email protected]>

commit 890030d3c425f49abaa4acf60e20f288b599f980 upstream.

When running a BA session, the driver (or the hardware) already takes care of retransmitting failed frames, since it has to keep the receiver reorder window in sync.

Adding another layer of retransmit around that does not improve anything. In fact, it can only lead to some strong reordering with huge latency.

---
 net/mac80211/status.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

@@ -51,7 +51,8 @@ static void ieee80211_handle_filtered_fr
 	struct ieee80211_hdr *hdr = (void *)skb->data;
 	int ac;
 
-	if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) {
+	if (info->flags & (IEEE80211_TX_CTL_NO_PS_BUFFER |
+			   IEEE80211_TX_CTL_AMPDU)) {
 		ieee80211_free_txskb(&local->hw, skb);
 		return;
 	}

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/mac80211-don-t-handle-filtered-frames-within-a-ba-session.patch