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mac80211: disable potentially harmful PS software retry for A-MPDU sessions

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Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2017-02-22 22:51:04 +01:00
parent 942ac18c8a
commit 9edff13abd
1 changed files with 28 additions and 0 deletions
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package/kernel/mac80211/patches/322-mac80211-don-t-handle-filtered-frames-within-a-BA-se.patch Normal file
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@ -0,0 +1,28 @@
From: Felix Fietkau <nbd@nbd.name>
Date: Wed, 22 Feb 2017 16:13:17 +0100
Subject: [PATCH] mac80211: don't handle filtered frames within a BA session
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.
Cc: stable@vger.kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
--- 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;
}