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

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

[gregkh]

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 <stable@vger.kernel.org> know about it.


>From 890030d3c425f49abaa4acf60e20f288b599f980 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@nbd.name>
Date: Wed, 22 Feb 2017 16:16:07 +0100
Subject: mac80211: don't handle filtered frames within a BA session

From: Felix Fietkau <nbd@nbd.name>

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.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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

--- a/net/mac80211/status.c
+++ b/net/mac80211/status.c
@@ -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 nbd@nbd.name are

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