wifi: cfg80211: remove scan_width support

There really isn't any support for scanning at different
channel widths than 20 MHz since there's no way to set it.
Remove this support for now, if somebody wants to maintain
this whole thing later we can revisit how it should work.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 15 insertions, 56 deletions

diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index 58d525e41f6b..24fa06105378 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -187,12 +187,6 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
 	else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC))
 		bss_meta.signal = (rx_status->signal * 100) / local->hw.max_signal;
 
-	bss_meta.scan_width = NL80211_BSS_CHAN_WIDTH_20;
-	if (rx_status->bw == RATE_INFO_BW_5)
-		bss_meta.scan_width = NL80211_BSS_CHAN_WIDTH_5;
-	else if (rx_status->bw == RATE_INFO_BW_10)
-		bss_meta.scan_width = NL80211_BSS_CHAN_WIDTH_10;
-
 	bss_meta.chan = channel;
 
 	rcu_read_lock();
@@ -315,22 +309,11 @@ void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb)
 		ieee80211_rx_bss_put(local, bss);
 }
 
-static void
-ieee80211_prepare_scan_chandef(struct cfg80211_chan_def *chandef,
-			       enum nl80211_bss_scan_width scan_width)
+static void ieee80211_prepare_scan_chandef(struct cfg80211_chan_def *chandef)
 {
 	memset(chandef, 0, sizeof(*chandef));
-	switch (scan_width) {
-	case NL80211_BSS_CHAN_WIDTH_5:
-		chandef->width = NL80211_CHAN_WIDTH_5;
-		break;
-	case NL80211_BSS_CHAN_WIDTH_10:
-		chandef->width = NL80211_CHAN_WIDTH_10;
-		break;
-	default:
-		chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
-		break;
-	}
+
+	chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
 }
 
 /* return false if no more work */
@@ -378,7 +361,7 @@ static bool ieee80211_prep_hw_scan(struct ieee80211_sub_if_data *sdata)
 	}
 
 	local->hw_scan_req->req.n_channels = n_chans;
-	ieee80211_prepare_scan_chandef(&chandef, req->scan_width);
+	ieee80211_prepare_scan_chandef(&chandef);
 
 	if (req->flags & NL80211_SCAN_FLAG_MIN_PREQ_CONTENT)
 		flags |= IEEE80211_PROBE_FLAG_MIN_CONTENT;
@@ -919,7 +902,6 @@ static void ieee80211_scan_state_set_channel(struct ieee80211_local *local,
 {
 	int skip;
 	struct ieee80211_channel *chan;
-	enum nl80211_bss_scan_width oper_scan_width;
 	struct cfg80211_scan_request *scan_req;
 
 	scan_req = rcu_dereference_protected(local->scan_req,
@@ -933,42 +915,21 @@ static void ieee80211_scan_state_set_channel(struct ieee80211_local *local,
 	local->scan_chandef.freq1_offset = chan->freq_offset;
 	local->scan_chandef.center_freq2 = 0;
 
-	/* For scanning on the S1G band, ignore scan_width (which is constant
-	 * across all channels) for now since channel width is specific to each
-	 * channel. Detect the required channel width here and likely revisit
-	 * later. Maybe scan_width could be used to build the channel scan list?
+	/* For scanning on the S1G band, detect the channel width according to
+	 * the channel being scanned.
 	 */
 	if (chan->band == NL80211_BAND_S1GHZ) {
 		local->scan_chandef.width = ieee80211_s1g_channel_width(chan);
 		goto set_channel;
 	}
 
-	switch (scan_req->scan_width) {
-	case NL80211_BSS_CHAN_WIDTH_5:
-		local->scan_chandef.width = NL80211_CHAN_WIDTH_5;
-		break;
-	case NL80211_BSS_CHAN_WIDTH_10:
-		local->scan_chandef.width = NL80211_CHAN_WIDTH_10;
-		break;
-	default:
-	case NL80211_BSS_CHAN_WIDTH_20:
-		/* If scanning on oper channel, use whatever channel-type
-		 * is currently in use.
-		 */
-		oper_scan_width = cfg80211_chandef_to_scan_width(
-					&local->_oper_chandef);
-		if (chan == local->_oper_chandef.chan &&
-		    oper_scan_width == scan_req->scan_width)
-			local->scan_chandef = local->_oper_chandef;
-		else
-			local->scan_chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
-		break;
-	case NL80211_BSS_CHAN_WIDTH_1:
-	case NL80211_BSS_CHAN_WIDTH_2:
-		/* shouldn't get here, S1G handled above */
-		WARN_ON(1);
-		break;
-	}
+	/* If scanning on oper channel, use whatever channel-type
+	 * is currently in use.
+	 */
+	if (chan == local->_oper_chandef.chan)
+		local->scan_chandef = local->_oper_chandef;
+	else
+		local->scan_chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
 
 set_channel:
 	if (ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL))
@@ -1152,8 +1113,7 @@ int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
 int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
 				const u8 *ssid, u8 ssid_len,
 				struct ieee80211_channel **channels,
-				unsigned int n_channels,
-				enum nl80211_bss_scan_width scan_width)
+				unsigned int n_channels)
 {
 	struct ieee80211_local *local = sdata->local;
 	int ret = -EBUSY, i, n_ch = 0;
@@ -1210,7 +1170,6 @@ int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
 
 	local->int_scan_req->ssids = &local->scan_ssid;
 	local->int_scan_req->n_ssids = 1;
-	local->int_scan_req->scan_width = scan_width;
 	memcpy(local->int_scan_req->ssids[0].ssid, ssid, IEEE80211_MAX_SSID_LEN);
 	local->int_scan_req->ssids[0].ssid_len = ssid_len;
 
@@ -1311,7 +1270,7 @@ int __ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
 		goto out;
 	}
 
-	ieee80211_prepare_scan_chandef(&chandef, req->scan_width);
+	ieee80211_prepare_scan_chandef(&chandef);
 
 	ieee80211_build_preq_ies(sdata, ie, num_bands * iebufsz,
 				 &sched_scan_ies, req->ie,