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mac80211: do not allow bigger VHT MPDUs than the hardware supports

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Signed-off-by: Felix Fietkau <nbd@nbd.name>
(cherry picked from commit caf727767a)
[Refreshed patch]
Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
This commit is contained in:
Felix Fietkau 2020-09-17 12:09:23 +02:00 committed by Koen Vandeputte
parent 9c718b5478
commit 6696fddfd9
1 changed files with 34 additions and 0 deletions
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package/kernel/mac80211/patches/subsys/331-mac80211-do-not-allow-bigger-VHT-MPDUs-than-the-hard.patch Normal file
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@ -0,0 +1,34 @@
From: Felix Fietkau <nbd@nbd.name>
Date: Thu, 17 Sep 2020 12:07:19 +0200
Subject: [PATCH] mac80211: do not allow bigger VHT MPDUs than the hardware
supports
Limit maximum VHT MPDU size by local capability
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
--- a/net/mac80211/vht.c
+++ b/net/mac80211/vht.c
@@ -170,10 +170,7 @@ ieee80211_vht_cap_ie_to_sta_vht_cap(stru
/* take some capabilities as-is */
cap_info = le32_to_cpu(vht_cap_ie->vht_cap_info);
vht_cap->cap = cap_info;
- vht_cap->cap &= IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895 |
- IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991 |
- IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 |
- IEEE80211_VHT_CAP_RXLDPC |
+ vht_cap->cap &= IEEE80211_VHT_CAP_RXLDPC |
IEEE80211_VHT_CAP_VHT_TXOP_PS |
IEEE80211_VHT_CAP_HTC_VHT |
IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK |
@@ -182,6 +179,9 @@ ieee80211_vht_cap_ie_to_sta_vht_cap(stru
IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN;
+ vht_cap->cap |= min_t(u32, cap_info & IEEE80211_VHT_CAP_MAX_MPDU_MASK,
+ own_cap.cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK);
+
/* and some based on our own capabilities */
switch (own_cap.cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ: