From: Sriram R Date: Wed, 25 Aug 2021 23:38:50 +0000 (+0530) Subject: cfg80211: use wiphy DFS domain if it is self-managed X-Git-Tag: accepted/tizen/unified/20230118.172025~6527^2~61^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=90bd5bee50f2a209ba66f013866959a56ff400b9;p=platform%2Fkernel%2Flinux-rpi.git cfg80211: use wiphy DFS domain if it is self-managed Currently during CAC start or other radar events, the DFS domain is fetched from cfg based on global DFS domain, even if the wiphy regdomain disagrees. But this could be different in case of self managed wiphy's in case the self managed driver updates its database or supports regions which has DFS domain set to UNSET in cfg80211 local regdomain. So for explicitly self-managed wiphys, just use their DFS domain. Signed-off-by: Sriram R Link: https://lore.kernel.org/r/1629934730-16388-1-git-send-email-srirrama@codeaurora.org Signed-off-by: Johannes Berg --- diff --git a/net/wireless/reg.c b/net/wireless/reg.c index c2d0ff7..df87c7f 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -171,9 +171,11 @@ enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy) { const struct ieee80211_regdomain *regd = NULL; const struct ieee80211_regdomain *wiphy_regd = NULL; + enum nl80211_dfs_regions dfs_region; rcu_read_lock(); regd = get_cfg80211_regdom(); + dfs_region = regd->dfs_region; if (!wiphy) goto out; @@ -182,6 +184,11 @@ enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy) if (!wiphy_regd) goto out; + if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) { + dfs_region = wiphy_regd->dfs_region; + goto out; + } + if (wiphy_regd->dfs_region == regd->dfs_region) goto out; @@ -193,7 +200,7 @@ enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy) out: rcu_read_unlock(); - return regd->dfs_region; + return dfs_region; } static void rcu_free_regdom(const struct ieee80211_regdomain *r)