From: Felix Fietkau <nbd@nbd.name>
Date: Thu, 26 Sep 2024 14:07:50 +0200
Subject: [PATCH] wifi: mac80211: use vif radio mask to limit creating chanctx

Reject frequencies not supported by any radio that the vif is allowed to use.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---

--- a/net/mac80211/chan.c
+++ b/net/mac80211/chan.c
@@ -1167,7 +1167,7 @@ ieee80211_replace_chanctx(struct ieee802
 static bool
 ieee80211_find_available_radio(struct ieee80211_local *local,
 			       const struct ieee80211_chan_req *chanreq,
-			       int *radio_idx)
+			       u32 radio_mask, int *radio_idx)
 {
 	struct wiphy *wiphy = local->hw.wiphy;
 	const struct wiphy_radio *radio;
@@ -1178,6 +1178,9 @@ ieee80211_find_available_radio(struct ie
 		return true;
 
 	for (i = 0; i < wiphy->n_radio; i++) {
+		if (!(radio_mask & BIT(i)))
+			continue;
+
 		radio = &wiphy->radio[i];
 		if (!cfg80211_radio_chandef_valid(radio, &chanreq->oper))
 			continue;
@@ -1211,7 +1214,9 @@ int ieee80211_link_reserve_chanctx(struc
 	new_ctx = ieee80211_find_reservation_chanctx(local, chanreq, mode);
 	if (!new_ctx) {
 		if (ieee80211_can_create_new_chanctx(local, -1) &&
-		    ieee80211_find_available_radio(local, chanreq, &radio_idx))
+		    ieee80211_find_available_radio(local, chanreq,
+						   sdata->wdev.radio_mask,
+						   &radio_idx))
 			new_ctx = ieee80211_new_chanctx(local, chanreq, mode,
 							false, radio_idx);
 		else
@@ -1881,7 +1886,9 @@ int _ieee80211_link_use_channel(struct i
 	/* Note: context is now reserved */
 	if (ctx)
 		reserved = true;
-	else if (!ieee80211_find_available_radio(local, chanreq, &radio_idx))
+	else if (!ieee80211_find_available_radio(local, chanreq,
+						 sdata->wdev.radio_mask,
+						 &radio_idx))
 		ctx = ERR_PTR(-EBUSY);
 	else
 		ctx = ieee80211_new_chanctx(local, chanreq, mode,