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[35.247.67.242]) by smtp.gmail.com with ESMTPSA id r19-20020a634413000000b005579f12a238sm7019842pga.86.2023.06.28.20.53.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 28 Jun 2023 20:53:59 -0700 (PDT) From: Abhishek Kumar To: johannes.berg@intel.com, kvalo@kernel.org Cc: linux-kernel@vger.kernel.org, kuabhs@chromium.org, netdev@vger.kernel.org, ath10k@lists.infradead.org, linux-wireless@vger.kernel.org, "David S. Miller" , Eric Dumazet , Jakub Kicinski , Johannes Berg , Paolo Abeni Subject: [PATCH 1/2] wifi: cfg80211: call reg_call_notifier on beacon hints Date: Thu, 29 Jun 2023 03:52:54 +0000 Message-ID: <20230629035254.1.I059fe585f9f9e896c2d51028ef804d197c8c009e@changeid> X-Mailer: git-send-email 2.41.0.162.gfafddb0af9-goog MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Currently the channel property updates are not propagated to driver. This causes issues in the discovery of hidden SSIDs and fails to connect to them. This change defines a new wiphy flag which when enabled by vendor driver, the reg_call_notifier callback will be trigger on beacon hints. This ensures that the channel property changes are visible to the vendor driver. The vendor changes the channels for active scans. This fixes the discovery issue of hidden SSID. Signed-off-by: Abhishek Kumar --- include/net/cfg80211.h | 3 +++ net/wireless/reg.c | 20 ++++++++++++-------- 2 files changed, 15 insertions(+), 8 deletions(-) diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 9e04f69712b1..48e6ebcdacb3 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -4783,6 +4783,8 @@ struct cfg80211_ops { * @WIPHY_FLAG_SUPPORTS_EXT_KCK_32: The device supports 32-byte KCK keys. * @WIPHY_FLAG_NOTIFY_REGDOM_BY_DRIVER: The device could handle reg notify for * NL80211_REGDOM_SET_BY_DRIVER. + * @WIPHY_FLAG_CHANNEL_CHANGE_ON_BEACON: reg_call_notifier() is called if driver + * set this flag to update channels on beacon hints. */ enum wiphy_flags { WIPHY_FLAG_SUPPORTS_EXT_KEK_KCK = BIT(0), @@ -4809,6 +4811,7 @@ enum wiphy_flags { WIPHY_FLAG_SUPPORTS_5_10_MHZ = BIT(22), WIPHY_FLAG_HAS_CHANNEL_SWITCH = BIT(23), WIPHY_FLAG_NOTIFY_REGDOM_BY_DRIVER = BIT(24), + WIPHY_FLAG_CHANNEL_CHANGE_ON_BEACON = BIT(25), }; /** diff --git a/net/wireless/reg.c b/net/wireless/reg.c index 26f11e4746c0..c76bfaad650b 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -2149,6 +2149,13 @@ static bool reg_is_world_roaming(struct wiphy *wiphy) return false; } +static void reg_call_notifier(struct wiphy *wiphy, + struct regulatory_request *request) +{ + if (wiphy->reg_notifier) + wiphy->reg_notifier(wiphy, request); +} + static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, struct reg_beacon *reg_beacon) { @@ -2156,6 +2163,7 @@ static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, struct ieee80211_channel *chan; bool channel_changed = false; struct ieee80211_channel chan_before; + struct regulatory_request *lr = get_last_request(); sband = wiphy->bands[reg_beacon->chan.band]; chan = &sband->channels[chan_idx]; @@ -2181,8 +2189,11 @@ static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, channel_changed = true; } - if (channel_changed) + if (channel_changed) { nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); + if (wiphy->flags & WIPHY_FLAG_CHANNEL_CHANGE_ON_BEACON) + reg_call_notifier(wiphy, lr); + } } /* @@ -2325,13 +2336,6 @@ static void reg_process_ht_flags(struct wiphy *wiphy) reg_process_ht_flags_band(wiphy, wiphy->bands[band]); } -static void reg_call_notifier(struct wiphy *wiphy, - struct regulatory_request *request) -{ - if (wiphy->reg_notifier) - wiphy->reg_notifier(wiphy, request); -} - static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev) { struct cfg80211_chan_def chandef = {};