autobuild_mac80211_release/package/kernel/mac80211_dev/patches/subsys/mtk-0022-mtk-mac80211-refactor-STA-CSA-parsing-flows.patch

From 8ecaec9854b8449c824f77a5b3b6c6bba6720b9d Mon Sep 17 00:00:00 2001
From: Michael-CY Lee <michael-cy.lee@mediatek.com>
Date: Thu, 28 Sep 2023 09:28:50 +0800
Subject: [PATCH 22/37] mtk: mac80211: refactor STA CSA parsing flows

This patch changes the flows when STA parses csa IE:

1. If Extended CSA IE is presented, this patch uses the subfield op_class
   to build the VHT and HE operation in 5 GHz and 6 GHz, respectively.
2. If Extended CSA IE is NOT presented but the Wide Bandwidth Channel
   Switch IE is presented, the new channel width is at least 40 MHz.
   Therefore this patch first prepares a 40 MHz chandef, then build the
   VHT and HE operation in 5 GHz and 6 GHz, respectively.
   Note that in a 6 GHz BSS, the subfield of Wide Bandwidth Channel Switch
   IE might be the VHT, deprecated VHT or HE operation, so this patch
   checks the combination of new channel width, ccfs0 and ccfs1 to build
   the correct HE operation.
3. From the HE/VHT operation created in step 1 or 2, this patch then
   creates the chandef and assigns it to csa_ie.

Signed-off-by: Michael-CY Lee <michael-cy.lee@mediatek.com>
---
 net/mac80211/spectmgmt.c | 508 ++++++++++++++++++++++++++++++++++-----
 1 file changed, 454 insertions(+), 54 deletions(-)

diff --git a/net/mac80211/spectmgmt.c b/net/mac80211/spectmgmt.c
index 871cdac..dee7a60 100644
--- a/net/mac80211/spectmgmt.c
+++ b/net/mac80211/spectmgmt.c
@@ -19,6 +19,332 @@
 #include "sta_info.h"
 #include "wme.h"
 
+static inline void
+op_class_to_6ghz_he_eht_oper(u8 op_class, struct ieee80211_channel *chan,
+			     struct ieee80211_he_operation *he_oper,
+			     struct ieee80211_eht_operation *eht_oper)
+{
+	u8 new_chan_width;
+	u32 he_oper_params, center_freq1 = 0, center_freq2 = 0;
+	struct ieee80211_he_6ghz_oper *he_6ghz_oper;
+	struct ieee80211_eht_operation_info *eht_oper_info;
+
+	new_chan_width = ieee80211_operating_class_to_chan_width(op_class);
+	if (!ieee80211_operating_class_to_center_freq(op_class, chan,
+						      &center_freq1,
+						      &center_freq2)) {
+		new_chan_width = NL80211_CHAN_WIDTH_20;
+		center_freq1 = chan->center_freq;
+	}
+
+	he_oper_params =
+		u32_encode_bits(1, IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
+	he_oper->he_oper_params = cpu_to_le32(he_oper_params);
+
+	he_6ghz_oper = (struct ieee80211_he_6ghz_oper *)he_oper->optional;
+	he_6ghz_oper->primary =
+		ieee80211_frequency_to_channel(chan->center_freq);
+	he_6ghz_oper->ccfs0 = ieee80211_frequency_to_channel(center_freq1);
+	he_6ghz_oper->ccfs1 = center_freq2 ?
+		ieee80211_frequency_to_channel(center_freq2) : 0;
+
+	switch (new_chan_width) {
+	case NL80211_CHAN_WIDTH_320:
+		/* Cannot derive center frequency for 320 MHZ from op_class
+		 * since it might be 320-1 or 320-2
+		 */
+		WARN_ON(1);
+		break;
+	case NL80211_CHAN_WIDTH_160:
+		he_6ghz_oper->ccfs1 = he_6ghz_oper->ccfs0;
+		he_6ghz_oper->ccfs0 += chan->center_freq < center_freq1 ? -8 : 8;
+		fallthrough;
+	case NL80211_CHAN_WIDTH_80P80:
+		he_6ghz_oper->control =
+			IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
+		break;
+	case NL80211_CHAN_WIDTH_80:
+		he_6ghz_oper->control =
+			IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
+		break;
+	case NL80211_CHAN_WIDTH_40:
+		he_6ghz_oper->control =
+			IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
+		break;
+	default:
+		he_6ghz_oper->control =
+			IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
+		break;
+	}
+
+	eht_oper->params = IEEE80211_EHT_OPER_INFO_PRESENT;
+
+	eht_oper_info =
+		(struct ieee80211_eht_operation_info *)eht_oper->optional;
+	eht_oper_info->control = he_6ghz_oper->control;
+	eht_oper_info->ccfs0 = he_6ghz_oper->ccfs0;
+	eht_oper_info->ccfs1 = he_6ghz_oper->ccfs1;
+}
+
+static inline void
+wbcs_ie_to_6ghz_he_eht_oper(const struct ieee80211_wide_bw_chansw_ie *wbcs_ie,
+			    u8 new_chan_no,
+			    struct ieee80211_he_operation *he_oper,
+			    struct ieee80211_eht_operation *eht_oper)
+{
+	u32 he_oper_params;
+	struct ieee80211_he_6ghz_oper *he_6ghz_oper;
+	struct ieee80211_eht_operation_info *eht_oper_info;
+	bool fallback_20mhz;
+	u8 ccfs_diff;
+
+	he_oper_params =
+		u32_encode_bits(1, IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
+	he_oper->he_oper_params = cpu_to_le32(he_oper_params);
+
+	he_6ghz_oper = (struct ieee80211_he_6ghz_oper *)he_oper->optional;
+	he_6ghz_oper->primary = new_chan_no;
+
+	/* The Wide Bandwidth Channel Switch IE in a 6 GHz BSS migth be
+	 * deprecated VHT operation, VHT operation (IEEE 802.11-2020 9.4.2.160)
+	 * or HE operation (IEEE P80211be D3.2 9.4.2.159).
+	 * Check the combination of width, ccfs0 and ccfs1 to build the correct
+	 * HE/EHT operation.
+	 */
+	he_6ghz_oper->ccfs0 = wbcs_ie->new_center_freq_seg0;
+	he_6ghz_oper->ccfs1 = wbcs_ie->new_center_freq_seg1;
+	switch (wbcs_ie->new_channel_width) {
+	case 0:
+		/* Must be [deprecated] VHT operation with 40 MHz bandwidth */
+		he_6ghz_oper->control =
+			IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
+		break;
+	case 1:
+		if (he_6ghz_oper->ccfs1) {
+			/* VHT operation with 160/80P80 MHz bandwidth */
+			he_6ghz_oper->control =
+				IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
+		} else if ((he_6ghz_oper->ccfs0 - 7) % 16 == 0) {
+			/* [deprecated] VHT operation with 80 MHz bandwidth */
+			he_6ghz_oper->control =
+				IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
+		} else {
+			/* HE operation with 40 MHz bandwidth */
+			he_6ghz_oper->control =
+				IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
+		}
+		break;
+	case 2:
+		if ((he_6ghz_oper->ccfs0 - 15) % 32 == 0) {
+			/* deprecated VHT operation with 160 MHz bandwidth */
+			he_6ghz_oper->control =
+				IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
+			he_6ghz_oper->ccfs1 = he_6ghz_oper->ccfs0;
+			he_6ghz_oper->ccfs0 +=
+				new_chan_no < he_6ghz_oper->ccfs0 ? -8 : 8;
+		} else {
+			/* HE operation with 80 MHz bandwidth */
+			he_6ghz_oper->control =
+				IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
+		}
+		break;
+	case 3:
+		/* Can be
+		 * 1. deprecated VHT operation with 80P80 MHz bandwidth
+		 * 2. HE operation with 160/80P80 MHz bandwidth
+		 */
+		he_6ghz_oper->control =
+			IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
+		break;
+	case 4:
+		/* 320 MHz bandwidth
+		 * TODO channel switch to 320 MHz bandwidth should be indiated
+		 * by Bandwidth Indication IE (IEEE P80211be D3.2 9.4.2.159)
+		 */
+		he_6ghz_oper->control = IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ;
+		break;
+	default:
+		/* Ignore invalid width */
+		break;
+	}
+
+	/* Validate the relationship between new channel width and center frequency
+	 * segments, and fallback to 20 MHz if the relationship is wrong.
+	 */
+	fallback_20mhz = false;
+	switch (he_6ghz_oper->control) {
+	case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
+		if ((he_6ghz_oper->ccfs0 - 3) % 8 != 0)
+			fallback_20mhz = true;
+		break;
+	case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
+		if ((he_6ghz_oper->ccfs0 - 7) % 16 != 0)
+			fallback_20mhz = true;
+		break;
+	case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
+		ccfs_diff = abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0);
+		if ((ccfs_diff == 8 && (he_6ghz_oper->ccfs1 - 15) % 32 != 0) ||
+		    (ccfs_diff > 16 && ((he_6ghz_oper->ccfs0 - 7) % 16 != 0 ||
+		    (he_6ghz_oper->ccfs1 - 7) % 16 != 0)))
+			fallback_20mhz = true;
+		break;
+	case IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ:
+		if ((he_6ghz_oper->ccfs1 - 31) % 32 != 0)
+			fallback_20mhz = true;
+		break;
+	}
+
+	if (fallback_20mhz) {
+		he_6ghz_oper->control =
+			IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
+		he_6ghz_oper->ccfs0 = he_6ghz_oper->primary;
+		he_6ghz_oper->ccfs1 = 0;
+	}
+
+	eht_oper->params = IEEE80211_EHT_OPER_INFO_PRESENT;
+	eht_oper_info =
+		(struct ieee80211_eht_operation_info *)eht_oper->optional;
+	eht_oper_info->control = he_6ghz_oper->control;
+	eht_oper_info->ccfs0 = he_6ghz_oper->ccfs0;
+	eht_oper_info->ccfs1 = he_6ghz_oper->ccfs1;
+}
+
+static inline void
+op_class_to_ht_vht_oper(u8 op_class, struct ieee80211_channel *chan,
+			struct ieee80211_ht_operation *ht_oper,
+			struct ieee80211_vht_operation *vht_oper)
+{
+	u8 new_chan_width;
+	u32 center_freq1 = 0, center_freq2 = 0;
+
+	new_chan_width = ieee80211_operating_class_to_chan_width(op_class);
+	if (!ieee80211_operating_class_to_center_freq(op_class, chan,
+						      &center_freq1,
+						      &center_freq2)) {
+		new_chan_width = NL80211_CHAN_WIDTH_20;
+		center_freq1 = chan->center_freq;
+	}
+
+	vht_oper->center_freq_seg0_idx =
+		ieee80211_frequency_to_channel(center_freq1);
+	vht_oper->center_freq_seg1_idx = center_freq2 ?
+		ieee80211_frequency_to_channel(center_freq2) : 0;
+
+	ht_oper->ht_param = (chan->center_freq / 20) & 1 ?
+				IEEE80211_HT_PARAM_CHA_SEC_ABOVE :
+				IEEE80211_HT_PARAM_CHA_SEC_BELOW;
+
+	switch (new_chan_width) {
+	case NL80211_CHAN_WIDTH_320:
+		WARN_ON(1);
+		break;
+	case NL80211_CHAN_WIDTH_160:
+		vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
+		vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
+		vht_oper->center_freq_seg0_idx +=
+			chan->center_freq < center_freq1 ? -8 : 8;
+		break;
+	case NL80211_CHAN_WIDTH_80P80:
+		vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
+		break;
+	case NL80211_CHAN_WIDTH_80:
+		vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
+		break;
+	default:
+		vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
+		if (chan->center_freq != center_freq1)
+			ht_oper->ht_param = chan->center_freq > center_freq1 ?
+				IEEE80211_HT_PARAM_CHA_SEC_BELOW :
+				IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
+		else
+			ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
+	}
+
+	ht_oper->operation_mode =
+		cpu_to_le16(vht_oper->center_freq_seg1_idx <<
+				IEEE80211_HT_OP_MODE_CCFS2_SHIFT);
+}
+
+static inline void
+wbcs_ie_to_ht_vht_oper(struct ieee80211_channel *chan,
+		       const struct ieee80211_wide_bw_chansw_ie *wbcs_ie,
+		       struct ieee80211_ht_operation *ht_oper,
+		       struct ieee80211_vht_operation *vht_oper)
+{
+	u8 new_chan_width, new_ccfs0, new_ccfs1;
+	bool fallback_20mhz;
+
+	new_chan_width = wbcs_ie->new_channel_width;
+	new_ccfs0 = wbcs_ie->new_center_freq_seg0;
+	new_ccfs1 = wbcs_ie->new_center_freq_seg1;
+
+	/* Validate the relationship between new channel width and center frequency
+	 * segments, and fallback to 20 MHz if the relationship is wrong.
+	 */
+	fallback_20mhz = false;
+	switch (new_chan_width) {
+	case IEEE80211_VHT_CHANWIDTH_USE_HT:
+		/* If the wide bandwidth channel switch IE is presented,
+		 * the new channel width is at least 40 MHz.
+		 */
+		if (!new_ccfs1) {
+			new_ccfs0 -= (new_ccfs0 >= 149) ? 151 : 38;
+			if (new_ccfs0 % 8 != 0)
+				fallback_20mhz = true;
+		} else {
+			fallback_20mhz = true;
+		}
+		break;
+	case IEEE80211_VHT_CHANWIDTH_80MHZ:
+		if (!new_ccfs1) {
+			new_ccfs0 -= (new_ccfs0 >= 149) ? 155 : 42;
+			if (new_ccfs0 % 16 != 0)
+				fallback_20mhz = true;
+			break;
+		} else if (abs(new_ccfs1 - new_ccfs0) == 8) {
+			new_ccfs0 = new_ccfs1;
+			new_ccfs1 = 0;
+		}
+		fallthrough;
+	case IEEE80211_VHT_CHANWIDTH_160MHZ:
+		if (!new_ccfs1) {
+			if (new_ccfs0 != 50 && new_ccfs0 != 114 && new_ccfs0 != 163)
+				fallback_20mhz = true;
+			break;
+		}
+		fallthrough;
+	case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
+		new_ccfs0 -= (new_ccfs0 >= 149) ? 155 : 42;
+		new_ccfs1 -= (new_ccfs1 >= 149) ? 155 : 42;
+		if (new_ccfs0 % 16 != 0 || new_ccfs1 % 16 != 0)
+			fallback_20mhz = true;
+		break;
+	default:
+		fallback_20mhz = true;
+	}
+
+	if (fallback_20mhz) {
+		ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
+
+		vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
+		vht_oper->center_freq_seg0_idx =
+			ieee80211_frequency_to_channel(chan->center_freq);
+		vht_oper->center_freq_seg1_idx = 0;
+
+	} else {
+		ht_oper->ht_param = (chan->center_freq / 20) & 1 ?
+					IEEE80211_HT_PARAM_CHA_SEC_ABOVE :
+					IEEE80211_HT_PARAM_CHA_SEC_BELOW;
+
+		vht_oper->chan_width = new_chan_width;
+		vht_oper->center_freq_seg0_idx = wbcs_ie->new_center_freq_seg0;
+		vht_oper->center_freq_seg1_idx = wbcs_ie->new_center_freq_seg1;
+	}
+
+	ht_oper->operation_mode = cpu_to_le16(vht_oper->center_freq_seg1_idx <<
+					      IEEE80211_HT_OP_MODE_CCFS2_SHIFT);
+}
+
 int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
 				 struct ieee802_11_elems *elems,
 				 enum nl80211_band current_band,
@@ -26,19 +352,27 @@ int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
 				 ieee80211_conn_flags_t conn_flags, u8 *bssid,
 				 struct ieee80211_csa_ie *csa_ie)
 {
+	struct ieee80211_supported_band *sband;
 	enum nl80211_band new_band = current_band;
-	int new_freq;
-	u8 new_chan_no;
+	int new_freq, size;
+	u8 new_chan_no = 0, new_op_class = 0;
 	struct ieee80211_channel *new_chan;
-	struct cfg80211_chan_def new_vht_chandef = {};
+	struct cfg80211_chan_def new_chandef = {};
 	const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
 	const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
+	const struct ieee80211_ext_chansw_ie *ext_chansw_ie;
+	struct ieee80211_ht_operation *ht_oper;
+	struct ieee80211_vht_operation *vht_oper;
+	struct ieee80211_he_operation *he_oper;
+	struct ieee80211_eht_operation *eht_oper;
+	struct ieee80211_sta_ht_cap sta_ht_cap;
 	int secondary_channel_offset = -1;
 
 	memset(csa_ie, 0, sizeof(*csa_ie));
 
 	sec_chan_offs = elems->sec_chan_offs;
 	wide_bw_chansw_ie = elems->wide_bw_chansw_ie;
+	ext_chansw_ie = elems->ext_chansw_ie;
 
 	if (conn_flags & (IEEE80211_CONN_DISABLE_HT |
 			  IEEE80211_CONN_DISABLE_40MHZ)) {
@@ -46,29 +380,30 @@ int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
 		wide_bw_chansw_ie = NULL;
 	}
 
-	if (conn_flags & IEEE80211_CONN_DISABLE_VHT)
-		wide_bw_chansw_ie = NULL;
-
-	if (elems->ext_chansw_ie) {
-		if (!ieee80211_operating_class_to_band(
-				elems->ext_chansw_ie->new_operating_class,
-				&new_band)) {
-			sdata_info(sdata,
-				   "cannot understand ECSA IE operating class, %d, ignoring\n",
-				   elems->ext_chansw_ie->new_operating_class);
+	if (ext_chansw_ie) {
+		new_op_class = ext_chansw_ie->new_operating_class;
+		if (!ieee80211_operating_class_to_band(new_op_class, &new_band)) {
+			new_op_class = 0;
+			sdata_info(sdata, "cannot understand ECSA IE "
+					  "operating class, %d, ignoring\n",
+				   ext_chansw_ie->new_operating_class);
+		} else {
+			new_chan_no = ext_chansw_ie->new_ch_num;
+			csa_ie->count = ext_chansw_ie->count;
+			csa_ie->mode = ext_chansw_ie->mode;
 		}
-		new_chan_no = elems->ext_chansw_ie->new_ch_num;
-		csa_ie->count = elems->ext_chansw_ie->count;
-		csa_ie->mode = elems->ext_chansw_ie->mode;
-	} else if (elems->ch_switch_ie) {
+	}
+
+	if (!new_op_class && elems->ch_switch_ie) {
 		new_chan_no = elems->ch_switch_ie->new_ch_num;
 		csa_ie->count = elems->ch_switch_ie->count;
 		csa_ie->mode = elems->ch_switch_ie->mode;
-	} else {
-		/* nothing here we understand */
-		return 1;
 	}
 
+	/* nothing here we understand */
+	if (!new_chan_no)
+		return 1;
+
 	/* Mesh Channel Switch Parameters Element */
 	if (elems->mesh_chansw_params_ie) {
 		csa_ie->ttl = elems->mesh_chansw_params_ie->mesh_ttl;
@@ -132,54 +467,119 @@ int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
 		break;
 	}
 
-	if (wide_bw_chansw_ie) {
-		u8 new_seg1 = wide_bw_chansw_ie->new_center_freq_seg1;
-		struct ieee80211_vht_operation vht_oper = {
-			.chan_width =
-				wide_bw_chansw_ie->new_channel_width,
-			.center_freq_seg0_idx =
-				wide_bw_chansw_ie->new_center_freq_seg0,
-			.center_freq_seg1_idx = new_seg1,
-			/* .basic_mcs_set doesn't matter */
-		};
-		struct ieee80211_ht_operation ht_oper = {
-			.operation_mode =
-				cpu_to_le16(new_seg1 <<
-					    IEEE80211_HT_OP_MODE_CCFS2_SHIFT),
-		};
-
-		/* default, for the case of IEEE80211_VHT_CHANWIDTH_USE_HT,
-		 * to the previously parsed chandef
-		 */
-		new_vht_chandef = csa_ie->chandef;
+	if (new_band == NL80211_BAND_6GHZ) {
+		size = sizeof(struct ieee80211_he_operation) +
+		       sizeof(struct ieee80211_he_6ghz_oper);
+		he_oper = kzalloc(size, GFP_KERNEL);
+		if (!he_oper)
+			return -ENOMEM;
+
+		size = sizeof(struct ieee80211_eht_operation) +
+		       sizeof(struct ieee80211_eht_operation_info);
+		eht_oper = kzalloc(size, GFP_KERNEL);
+		if (!eht_oper) {
+			kfree(he_oper);
+			return -ENOMEM;
+		}
+
+		if (new_op_class && new_op_class != 135 && new_op_class != 137) {
+			/* There is no way to tell the ccfs1 for op_class 135
+			 * (80P80 MHz) and 137 (320 MHz).
+			 */
+			op_class_to_6ghz_he_eht_oper(new_op_class, new_chan,
+						     he_oper, eht_oper);
+		} else if (wide_bw_chansw_ie) {
+			wbcs_ie_to_6ghz_he_eht_oper(wide_bw_chansw_ie,
+						    new_chan_no, he_oper,
+						    eht_oper);
+		}
+
+		new_chandef = csa_ie->chandef;
 
 		/* 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;
+		if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, eht_oper,
+						    &new_chandef))
+			new_chandef.chan = NULL;
+
+		kfree(he_oper);
+		kfree(eht_oper);
+	} else {
+		sband = sdata->local->hw.wiphy->bands[new_band];
+		memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
+		ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
+
+		if (!sta_ht_cap.ht_supported ||
+		    !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
+			goto out;
+
+		ht_oper = kzalloc(sizeof(*ht_oper), GFP_KERNEL);
+		if (!ht_oper)
+			return -ENOMEM;
+
+		vht_oper = kzalloc(sizeof(*vht_oper), GFP_KERNEL);
+		if (!vht_oper) {
+			kfree(ht_oper);
+			return -ENOMEM;
+		}
+
+		if (new_op_class && new_op_class != 130) {
+			/* There is no way to tell the ccfs1 for op_class 130
+			 * (80P80 MHz).
+			 */
+			op_class_to_ht_vht_oper(new_op_class, new_chan, ht_oper,
+						vht_oper);
+		} else if (wide_bw_chansw_ie && new_band == NL80211_BAND_5GHZ &&
+			   sband->vht_cap.vht_supported) {
+			/* It is assumed that there is no WBCS IE in the beacon
+			 * from a 2 GHz BSS during a channel switch.
+			 */
+			wbcs_ie_to_ht_vht_oper(new_chan, wide_bw_chansw_ie,
+					       ht_oper, vht_oper);
+		} else {
+			kfree(ht_oper);
+			kfree(vht_oper);
+			goto out;
+		}
+
+		new_chandef = csa_ie->chandef;
+
+		ieee80211_chandef_ht_oper(ht_oper, &new_chandef);
+
+		/* ignore if parsing fails */
+		if (sband->vht_cap.vht_supported &&
+		    !ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info,
+						vht_oper, ht_oper, &new_chandef))
+			new_chandef.chan = NULL;
+
+		kfree(ht_oper);
+		kfree(vht_oper);
+	}
+
+	if (new_chandef.chan) {
+		if (conn_flags & IEEE80211_CONN_DISABLE_320MHZ &&
+		    new_chandef.width == NL80211_CHAN_WIDTH_320)
+			ieee80211_chandef_downgrade(&new_chandef);
 
 		if (conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ &&
-		    new_vht_chandef.width == NL80211_CHAN_WIDTH_80P80)
-			ieee80211_chandef_downgrade(&new_vht_chandef);
+		    new_chandef.width == NL80211_CHAN_WIDTH_80P80)
+			ieee80211_chandef_downgrade(&new_chandef);
+
 		if (conn_flags & IEEE80211_CONN_DISABLE_160MHZ &&
-		    new_vht_chandef.width == NL80211_CHAN_WIDTH_160)
-			ieee80211_chandef_downgrade(&new_vht_chandef);
-	}
+		    new_chandef.width == NL80211_CHAN_WIDTH_160)
+			ieee80211_chandef_downgrade(&new_chandef);
 
-	/* if VHT data is there validate & use it */
-	if (new_vht_chandef.chan) {
-		if (!cfg80211_chandef_compatible(&new_vht_chandef,
+		if (!cfg80211_chandef_compatible(&new_chandef,
 						 &csa_ie->chandef)) {
 			sdata_info(sdata,
 				   "BSS %pM: CSA has inconsistent channel data, disconnecting\n",
 				   bssid);
 			return -EINVAL;
 		}
-		csa_ie->chandef = new_vht_chandef;
+
+		csa_ie->chandef = new_chandef;
 	}
 
+out:
 	if (elems->max_channel_switch_time)
 		csa_ie->max_switch_time =
 			(elems->max_channel_switch_time[0] << 0) |
-- 
2.18.0