From db8dfee57d37d2cd14a750477babbae52b69a494 Mon Sep 17 00:00:00 2001 From: Arik Nemtsov Date: Mon, 15 Dec 2014 19:26:02 +0200 Subject: [PATCH] cfg80211: avoid intersection when applying self-managed reg The custom-reg handling function can currently only add flags to a given channel. This results in stale flags being left applied. In some cases a channel was disabled and even the orig_flags were changed to reflect this. Previously the API was designed for a single invocation before wiphy registration, so this didn't matter. The previous approach doesn't scale well to self-managed regulatory devices, particularly when a more permissive regdom is applied after a restrictive one. Signed-off-by: Arik Nemtsov Signed-off-by: Johannes Berg --- net/wireless/reg.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git a/net/wireless/reg.c b/net/wireless/reg.c index c040f8a0f1ed..9a5411cdf5e8 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -1680,8 +1680,12 @@ static void handle_channel_custom(struct wiphy *wiphy, if (IS_ERR(reg_rule)) { REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", chan->center_freq); - chan->orig_flags |= IEEE80211_CHAN_DISABLED; - chan->flags = chan->orig_flags; + if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) { + chan->flags |= IEEE80211_CHAN_DISABLED; + } else { + chan->orig_flags |= IEEE80211_CHAN_DISABLED; + chan->flags = chan->orig_flags; + } return; } @@ -1706,7 +1710,13 @@ static void handle_channel_custom(struct wiphy *wiphy, chan->dfs_state = NL80211_DFS_USABLE; chan->beacon_found = false; - chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; + + if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) + chan->flags = chan->orig_flags | bw_flags | + map_regdom_flags(reg_rule->flags); + else + chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; + chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); chan->max_reg_power = chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); -- 2.30.2