From: Michael Tremer <michael.tremer@ipfire.org>
Date: Wed, 23 Jul 2025 13:46:09 +0000 (+0200)
Subject: hostapd: Filter out some unsupported VHT caps by driver
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=61f0cb9cfb5f37a3b762d835586cd66d8884bbc5;p=ipfire-2.x.git

hostapd: Filter out some unsupported VHT caps by driver

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---

diff --git a/src/initscripts/packages/hostapd b/src/initscripts/packages/hostapd
index 0e58c3f1c..53d77545f 100644
--- a/src/initscripts/packages/hostapd
+++ b/src/initscripts/packages/hostapd
@@ -86,6 +86,11 @@ declare -A VHT_CAPS=(
 	[0x20000000]="[TX-ANTENNA-PATTERN]"
 )
 
+declare -A VHT_CAPS_DRIVER_FILTERS=(
+	# ath12k does not support Short GI for 160 MHz
+	[ath12k_pci]="$(( 0xffffffff & ~0x00000020 ))"
+)
+
 find_interface() {
 	local address="${1}"
 
@@ -137,6 +142,12 @@ write_config() {
 		ht_flags="$(( ${ht_flags} & ${HT_CAPS_DRIVER_FILTERS[${driver}]} ))"
 	fi
 
+	# Fix the VHT caps because some drivers don't support everything
+	# that the actual hardware supports (or have it turned off because of bugs).
+	if [ -n "${VHT_CAPS_DRIVER_FILTERS[${driver}]}" ]; then
+		vht_flags="$(( ${vht_flags} & ${VHT_CAPS_DRIVER_FILTERS[${driver}]} ))"
+	fi
+
 	# HT Capabilities
 	for flag in ${!HT_CAPS[@]}; do
 		if (( ${ht_flags} & ${flag} )); then