From 29c3e95f79adcef9d7999ec643639033585dba08 Mon Sep 17 00:00:00 2001
From: Mathy Vanhoef <Mathy.Vanhoef@kuleuven.be>
Date: Thu, 23 Jul 2020 14:01:50 +0400
Subject: [PATCH] mac80211: do not overwrite the sequence number if requested
Git-commit: 29c3e95f79adcef9d7999ec643639033585dba08
Patch-mainline: v5.9-rc1
References: jsc#SLE-13430
Check if the Tx control flag is set to prevent sequence number overwrites,
and if so, do not assign a new sequence number to the transmitted frame.
Signed-off-by: Mathy Vanhoef <Mathy.Vanhoef@kuleuven.be>
Link: https://lore.kernel.org/r/20200723100153.31631-3-Mathy.Vanhoef@kuleuven.be
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
net/mac80211/tx.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 413345056445..e1e915e7cc8e 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -825,6 +825,9 @@ ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
if (ieee80211_is_qos_nullfunc(hdr->frame_control))
return TX_CONTINUE;
+ if (info->control.flags & IEEE80211_TX_CTRL_NO_SEQNO)
+ return TX_CONTINUE;
+
/*
* Anything but QoS data that has a sequence number field
* (is long enough) gets a sequence number from the global
--
2.16.4