3 files changed, 6 insertions, 33 deletions

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 4603350989c8..fca93cd36bd3 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -3683,12 +3683,7 @@ static bool ieee80211_is_scan_ongoing(struct wiphy *wiphy,
 	if (list_empty(&local->roc_list) && !local->scanning)
 		return false;
 
-	if (wiphy->n_radio < 2)
-		return true;
-
 	req_radio_idx = cfg80211_get_radio_idx_by_chan(wiphy, chandef->chan);
-	if (req_radio_idx < 0)
-		return true;
 
 	if (local->scanning) {
 		scan_req = wiphy_dereference(wiphy, local->scan_req);
@@ -3707,14 +3702,6 @@ static bool ieee80211_is_scan_ongoing(struct wiphy *wiphy,
 	list_for_each_entry(roc, &local->roc_list, list) {
 		chan_radio_idx = cfg80211_get_radio_idx_by_chan(wiphy,
 								roc->chan);
-		/*
-		 * The roc work is added but chan_radio_idx is invalid.
-		 * Should not happen but if it does, let's not take
-		 * risk and return true.
-		 */
-		if (chan_radio_idx < 0)
-			return true;
-
 		if (chan_radio_idx == req_radio_idx)
 			return true;
 	}
diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c
index c9cea0e7ac16..57065714cf8c 100644
--- a/net/mac80211/chan.c
+++ b/net/mac80211/chan.c
@@ -659,19 +659,8 @@ bool ieee80211_is_radar_required(struct ieee80211_local *local,
 
 	for_each_sdata_link(local, link) {
 		if (link->radar_required) {
-			if (wiphy->n_radio < 2)
-				return true;
-
 			chan = link->conf->chanreq.oper.chan;
 			radio_idx = cfg80211_get_radio_idx_by_chan(wiphy, chan);
-			/*
-			 * The radio index (radio_idx) is expected to be valid,
-			 * as it's derived from a channel tied to a link. If
-			 * it's invalid (i.e., negative), return true to avoid
-			 * potential issues with radar-sensitive operations.
-			 */
-			if (radio_idx < 0)
-				return true;
 
 			if (ieee80211_is_radio_idx_in_scan_req(wiphy, req,
 							       radio_idx))
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 32f1bc5908c5..51e3e3c913f7 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -4022,16 +4022,13 @@ bool ieee80211_is_radio_idx_in_scan_req(struct wiphy *wiphy,
 	for (i = 0; i < scan_req->n_channels; i++) {
 		chan = scan_req->channels[i];
 		chan_radio_idx = cfg80211_get_radio_idx_by_chan(wiphy, chan);
-		/*
-		 * The chan_radio_idx should be valid since it's taken from a
-		 * valid scan request.
-		 * However, if chan_radio_idx is unexpectedly invalid (negative),
-		 * we take a conservative approach and assume the scan request
-		 * might use the specified radio_idx. Hence, return true.
-		 */
-		if (WARN_ON(chan_radio_idx < 0))
-			return true;
 
+		/* The radio index either matched successfully, or an error
+		 * occurred. For example, if radio-level information is
+		 * missing, the same error value is returned. This
+		 * typically implies a single-radio setup, in which case
+		 * the operation should not be allowed.
+		 */
 		if (chan_radio_idx == radio_idx)
 			return true;
 	}