mac80211: avoid using ext NSS high BW if not supported
If the AP advertises inconsistent data, namely it has CCFS1 or CCFS2,
but doesn't advertise support for 160/80+80 bandwidth or "Extended NSS
BW Support", then we cannot use any MCSes in the the higher bandwidth.
Thus, avoid connecting with higher bandwidth since it's less efficient
that way.
Link: https://lore.kernel.org/r/20200528213443.0e55d40c3ccc.I6fd0b4708ebd087e5e46466c3e91f6efbcbef668@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/spectmgmt.c b/net/mac80211/spectmgmt.c
index 5fe2b64..ae1cb2c 100644
--- a/net/mac80211/spectmgmt.c
+++ b/net/mac80211/spectmgmt.c
@@ -9,7 +9,7 @@
* Copyright 2007, Michael Wu <flamingice@sourmilk.net>
* Copyright 2007-2008, Intel Corporation
* Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
- * Copyright (C) 2018 Intel Corporation
+ * Copyright (C) 2018, 2020 Intel Corporation
*/
#include <linux/ieee80211.h>
@@ -22,6 +22,7 @@
int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
struct ieee802_11_elems *elems,
enum nl80211_band current_band,
+ u32 vht_cap_info,
u32 sta_flags, u8 *bssid,
struct ieee80211_csa_ie *csa_ie)
{
@@ -150,6 +151,7 @@ int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
/* ignore if parsing fails */
if (!ieee80211_chandef_vht_oper(&sdata->local->hw,
+ vht_cap_info,
&vht_oper, &ht_oper,
&new_vht_chandef))
new_vht_chandef.chan = NULL;