[PATCH v2] wifi: cfg80211: check radio iface combination for multi radio per wiphy

[Karthikeyan Periyasamy <quic_periyasa@xxxxxxxxxxx>]

Currently, wiphy_verify_combinations() fails for the multi-radio per wiphy
due to the condition check on global interface combination that DFS only
works on one channel. In a multi-radio scenario, global interface
combination encompasses the capabilities of all radio combinations, so it
supports more than one channel with DFS. For multi-radio per wiphy,
interface combination verification needs to be performed for radio specific
interface combinations. This is necessary as the global interface
combination combines the capabilities of all radio combinations.

Fixes: a01b1e9f9955 ("wifi: mac80211: add support for DFS with multiple radios")
Signed-off-by: Karthikeyan Periyasamy <quic_periyasa@xxxxxxxxxxx>
---
 v2:
  - Rebased to ToT

 net/wireless/core.c | 32 +++++++++++++++++++++++++++++---
 1 file changed, 29 insertions(+), 3 deletions(-)

diff --git a/net/wireless/core.c b/net/wireless/core.c
index 4d5d351bd0b5..de33bdde1e29 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -603,16 +603,19 @@ struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv,
 }
 EXPORT_SYMBOL(wiphy_new_nm);
 
-static int wiphy_verify_combinations(struct wiphy *wiphy)
+static
+int wiphy_verify_iface_combinations(struct wiphy *wiphy,
+				    const struct ieee80211_iface_combination *iface_comb,
+				    int n_iface_comb)
 {
 	const struct ieee80211_iface_combination *c;
 	int i, j;
 
-	for (i = 0; i < wiphy->n_iface_combinations; i++) {
+	for (i = 0; i < n_iface_comb; i++) {
 		u32 cnt = 0;
 		u16 all_iftypes = 0;
 
-		c = &wiphy->iface_combinations[i];
+		c = &iface_comb[i];
 
 		/*
 		 * Combinations with just one interface aren't real,
@@ -693,6 +696,29 @@ static int wiphy_verify_combinations(struct wiphy *wiphy)
 	return 0;
 }
 
+static int wiphy_verify_combinations(struct wiphy *wiphy)
+{
+	int i, ret;
+
+	if (wiphy->n_radio) {
+		for (i = 0; i < wiphy->n_radio; i++) {
+			const struct wiphy_radio *radio = &wiphy->radio[i];
+
+			ret = wiphy_verify_iface_combinations(wiphy,
+							      radio->iface_combinations,
+							      radio->n_iface_combinations);
+			if (ret)
+				return ret;
+		}
+	} else {
+		ret = wiphy_verify_iface_combinations(wiphy,
+						      wiphy->iface_combinations,
+						      wiphy->n_iface_combinations);
+	}
+
+	return ret;
+}
+
 int wiphy_register(struct wiphy *wiphy)
 {
 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);

base-commit: cc32e9fb380d8afdbf3486d7063d5520bfb0f071
-- 
2.34.1