[PATCH 2/3] mwifiex: fix incorrect ht capability problem
From: Ganapathi Bhat <hidden>
Date: 2018-03-09 18:20:28
Subsystem:
marvell mwifiex wireless driver, the rest · Maintainers:
Brian Norris, Linus Torvalds
IEEE80211_CHAN_NO_HT40PLUS and IEEE80211_CHAN_NO_HT40PLUS channel flags tell if HT40 operation is allowed on a channel or not. This patch ensures ht_capability information is modified accordingly so that we don't end up creating a HT40 connection when it's not allowed for current regulatory domain. Signed-off-by: Cathy Luo <redacted> Signed-off-by: Ganapathi Bhat <redacted> --- drivers/net/wireless/marvell/mwifiex/11n.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+)
diff --git a/drivers/net/wireless/marvell/mwifiex/11n.c b/drivers/net/wireless/marvell/mwifiex/11n.c
index 8772e39..feebfdc 100644
--- a/drivers/net/wireless/marvell/mwifiex/11n.c
+++ b/drivers/net/wireless/marvell/mwifiex/11n.c@@ -341,6 +341,36 @@ int mwifiex_cmd_11n_cfg(struct mwifiex_private *priv, le16_to_cpu(ht_cap->header.len)); mwifiex_fill_cap_info(priv, radio_type, &ht_cap->ht_cap); + /* Update HT40 capability from current channel information */ + if (bss_desc->bcn_ht_oper) { + u8 ht_param = bss_desc->bcn_ht_oper->ht_param; + u8 radio = + mwifiex_band_to_radio_type(bss_desc->bss_band); + int freq = + ieee80211_channel_to_frequency(bss_desc->channel, + radio); + struct ieee80211_channel *chan = + ieee80211_get_channel(priv->adapter->wiphy, freq); + + switch (ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { + case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: + if (chan->flags & IEEE80211_CHAN_NO_HT40PLUS) { + ht_cap->ht_cap.cap_info &= + ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; + ht_cap->ht_cap.cap_info &= + ~IEEE80211_HT_CAP_SGI_40; + } + break; + case IEEE80211_HT_PARAM_CHA_SEC_BELOW: + if (chan->flags & IEEE80211_CHAN_NO_HT40MINUS) { + ht_cap->ht_cap.cap_info &= + ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; + ht_cap->ht_cap.cap_info &= + ~IEEE80211_HT_CAP_SGI_40; + } + break; + } + } *buffer += sizeof(struct mwifiex_ie_types_htcap); ret_len += sizeof(struct mwifiex_ie_types_htcap);
--
1.9.1