From 8ae227f8a7749eec92fc381dfbe213429c852278 Mon Sep 17 00:00:00 2001 From: Benjamin Berg Date: Tue, 11 Mar 2025 12:17:04 +0100 Subject: [PATCH] wifi: mac80211: fix MPDU length parsing for EHT 5/6 GHz The MPDU length is only configured using the EHT capabilities element on 2.4 GHz. On 5/6 GHz it is configured using the VHT or HE capabilities respectively. Fixes: cf0079279727 ("wifi: mac80211: parse A-MSDU len from EHT capabilities") Reviewed-by: Miriam Rachel Korenblit Signed-off-by: Benjamin Berg Link: https://patch.msgid.link/20250311121704.0634d31f0883.I28063e4d3ef7d296b7e8a1c303460346a30bf09c@changeid Signed-off-by: Johannes Berg --- net/mac80211/eht.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/net/mac80211/eht.c b/net/mac80211/eht.c index 7a3116c36df9f..fd41046e3b681 100644 --- a/net/mac80211/eht.c +++ b/net/mac80211/eht.c @@ -2,7 +2,7 @@ /* * EHT handling * - * Copyright(c) 2021-2024 Intel Corporation + * Copyright(c) 2021-2025 Intel Corporation */ #include "ieee80211_i.h" @@ -76,6 +76,13 @@ ieee80211_eht_cap_ie_to_sta_eht_cap(struct ieee80211_sub_if_data *sdata, link_sta->cur_max_bandwidth = ieee80211_sta_cap_rx_bw(link_sta); link_sta->pub->bandwidth = ieee80211_sta_cur_vht_bw(link_sta); + /* + * The MPDU length bits are reserved on all but 2.4 GHz and get set via + * VHT (5 GHz) or HE (6 GHz) capabilities. + */ + if (sband->band != NL80211_BAND_2GHZ) + return; + switch (u8_get_bits(eht_cap->eht_cap_elem.mac_cap_info[0], IEEE80211_EHT_MAC_CAP0_MAX_MPDU_LEN_MASK)) { case IEEE80211_EHT_MAC_CAP0_MAX_MPDU_LEN_11454: