[PATCH v4 02/11] wifi: mac80211: use vif radio mask to limit ibss scan frequencies

[Felix Fietkau <nbd@xxxxxxxx>]

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

Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
---
 net/mac80211/scan.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index adb88c06b598..2ca75cf17242 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -1176,14 +1176,16 @@ int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
 				unsigned int n_channels)
 {
 	struct ieee80211_local *local = sdata->local;
-	int ret = -EBUSY, i, n_ch = 0;
+	int ret = -EINVAL, i, n_ch = 0;
 	enum nl80211_band band;
 
 	lockdep_assert_wiphy(local->hw.wiphy);
 
 	/* busy scanning */
-	if (local->scan_req)
+	if (local->scan_req) {
+		ret = -EBUSY;
 		goto unlock;
+	}
 
 	/* fill internal scan request */
 	if (!channels) {
@@ -1200,7 +1202,9 @@ int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
 				    &local->hw.wiphy->bands[band]->channels[i];
 
 				if (tmp_ch->flags & (IEEE80211_CHAN_NO_IR |
-						     IEEE80211_CHAN_DISABLED))
+						     IEEE80211_CHAN_DISABLED) ||
+				    !cfg80211_wdev_channel_allowed(&sdata->wdev,
+								   tmp_ch))
 					continue;
 
 				local->int_scan_req->channels[n_ch] = tmp_ch;
@@ -1215,14 +1219,16 @@ int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
 	} else {
 		for (i = 0; i < n_channels; i++) {
 			if (channels[i]->flags & (IEEE80211_CHAN_NO_IR |
-						  IEEE80211_CHAN_DISABLED))
+						  IEEE80211_CHAN_DISABLED) ||
+			    !cfg80211_wdev_channel_allowed(&sdata->wdev,
+							   channels[i]))
 				continue;
 
 			local->int_scan_req->channels[n_ch] = channels[i];
 			n_ch++;
 		}
 
-		if (WARN_ON_ONCE(n_ch == 0))
+		if (n_ch == 0)
 			goto unlock;
 
 		local->int_scan_req->n_channels = n_ch;
-- 
git-series 0.9.1