From: Luis R. Rodriguez <lrodriguez@atheros.com>
Date: Tue, 19 May 2009 21:49:47 +0000 (-0400)
Subject: cfg80211: warn when wiphy_apply_custom_regulatory() does nothing
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=bbcf3f02771e069d0e113fe9bb62c27b671abf97;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

cfg80211: warn when wiphy_apply_custom_regulatory() does nothing

Device drivers using wiphy_apply_custom_regulatory() want some
regulatory settings applied to their wiphy, if no bands were
configured on the wiphy then something went wrong.

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 8d176a8010ba..df0ced9405d3 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -1344,13 +1344,22 @@ void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
 				   const struct ieee80211_regdomain *regd)
 {
 	enum ieee80211_band band;
+	unsigned int bands_set = 0;
 
 	mutex_lock(&cfg80211_mutex);
 	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
-		if (wiphy->bands[band])
-			handle_band_custom(wiphy, band, regd);
+		if (!wiphy->bands[band])
+			continue;
+		handle_band_custom(wiphy, band, regd);
+		bands_set++;
 	}
 	mutex_unlock(&cfg80211_mutex);
+
+	/*
+	 * no point in calling this if it won't have any effect
+	 * on your device's supportd bands.
+	 */
+	WARN_ON(!bands_set);
 }
 EXPORT_SYMBOL(wiphy_apply_custom_regulatory);