From: Eliad Peller <eliad@wizery.com>
Date: Thu, 27 Mar 2014 06:58:32 +0000 (+0200)
Subject: wpa_supplicant: Override HT A-MPDU size if VHT A-MPDU was overridden
X-Git-Tag: hostap_2_2~444
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=4f560cdee34e0689a698b38beaeae3d48dadd913;p=thirdparty%2Fhostap.git

wpa_supplicant: Override HT A-MPDU size if VHT A-MPDU was overridden

According to the standard, if the max A-MPDU VHT cap is <= 3, we
have to adjust the max A-MPDU HT cap to the same value. Otherwise
it should be set to 3.

Take care of it when the max VHT A-MPDU value is overridden.

Signed-off-by: Eliad Peller <eliadx.peller@intel.com>
---

diff --git a/wpa_supplicant/wpa_supplicant.c b/wpa_supplicant/wpa_supplicant.c
index dce1c008b..b47e42358 100644
--- a/wpa_supplicant/wpa_supplicant.c
+++ b/wpa_supplicant/wpa_supplicant.c
@@ -2957,6 +2957,10 @@ void wpa_supplicant_apply_vht_overrides(
 {
 	struct ieee80211_vht_capabilities *vhtcaps;
 	struct ieee80211_vht_capabilities *vhtcaps_mask;
+#ifdef CONFIG_HT_OVERRIDES
+	int max_ampdu;
+	const u32 max_ampdu_mask = VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MAX;
+#endif /* CONFIG_HT_OVERRIDES */
 
 	if (!ssid)
 		return;
@@ -2972,6 +2976,20 @@ void wpa_supplicant_apply_vht_overrides(
 	vhtcaps->vht_capabilities_info = ssid->vht_capa;
 	vhtcaps_mask->vht_capabilities_info = ssid->vht_capa_mask;
 
+#ifdef CONFIG_HT_OVERRIDES
+	/* if max ampdu is <= 3, we have to make the HT cap the same */
+	if (ssid->vht_capa_mask & max_ampdu_mask) {
+		max_ampdu = (ssid->vht_capa & max_ampdu_mask) >>
+			find_first_bit(max_ampdu_mask);
+
+		max_ampdu = max_ampdu < 3 ? max_ampdu : 3;
+		wpa_set_ampdu_factor(wpa_s,
+				     (void *) params->htcaps,
+				     (void *) params->htcaps_mask,
+				     max_ampdu);
+	}
+#endif /* CONFIG_HT_OVERRIDES */
+
 #define OVERRIDE_MCS(i)							\
 	if (ssid->vht_tx_mcs_nss_ ##i >= 0) {				\
 		vhtcaps_mask->vht_supported_mcs_set.tx_map |=		\