From: Felix Fietkau <nbd@nbd.name>
To: linux-wireless@vger.kernel.org
Cc: johannes@sipsolutions.net
Subject: [PATCH wireless-next] wifi: mac80211_hwsim: reserve headroom for software encryption
Date: Wed, 30 Sep 2026 10:47:29 +0200 [thread overview]
Message-ID: <20260930084729.3000295-1-nbd@nbd.name> (raw)
mac80211_hwsim accepts CCMP and GCMP keys in mac80211_hwsim_set_key()
and encrypts unicast data frames itself in mac80211_hwsim_tx(), through
ieee80211_encrypt_tx_skb(). It asks mac80211 to reserve tailroom for the
MIC, but not headroom for the CCMP or GCMP header.
Reserve the header as driver headroom.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
drivers/net/wireless/virtual/mac80211_hwsim_main.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/net/wireless/virtual/mac80211_hwsim_main.c b/drivers/net/wireless/virtual/mac80211_hwsim_main.c
index b9446577ff49..c98c862678a2 100644
--- a/drivers/net/wireless/virtual/mac80211_hwsim_main.c
+++ b/drivers/net/wireless/virtual/mac80211_hwsim_main.c
@@ -5906,6 +5906,7 @@ static int mac80211_hwsim_new_radio(struct genl_info *info,
hw->queues = 5;
hw->offchannel_tx_hw_queue = 4;
+ hw->extra_tx_headroom = IEEE80211_CCMP_HDR_LEN;
ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
ieee80211_hw_set(hw, CHANCTX_STA_CSA);
--
2.47.3
reply other threads:[~2026-09-30 8:47 UTC|newest]
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