From: Ping-Ke Shih Date: Fri, 29 May 2020 02:50:09 +0000 (+0800) Subject: rtw88: fix EAPOL 4-way failure by finish IQK earlier X-Git-Tag: baikal/mips/sdk5.9~13530^2~46^2~14 X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=dadccbb5a58aa8281c8aa30d0b15162ed54cb46d;p=kernel.git rtw88: fix EAPOL 4-way failure by finish IQK earlier Connecting to an AP with WPA2 security may fail. The IQK and the EAPOL 4-way handshake may overlap because the driver does IQK right after assoc success. For 802.11n devices, the IQK is done in the driver and it could require more than 100ms to complete. During IQK, any TX/RX events are paused. So if the EAPOL 4-way handshake started before IQK finished, then the 1/4 and 2/4 part of the handshake could be dropped. The AP will then issue deauth with reason IEEE8021X_FAILED (23). To resolve this, move IQK routine into managed TX prepare (ieee80211_ops::mgd_prepare_tx()). The callback is called before the managed frames (auth/assoc) are sent. This will make sure that the IQK is completed before the handshake starts. But don't do IQK during scanning because doing it on each channel will take too long. For 802.11ac devices, the IQK is done in firmware and it takes less time to complete. Therefore we don't see a failure during the EAPOL 4-way handshake. But it is still worth moving the IQK into ieee80211_ops::mgd_prepare_tx(). Fixes: fda8a5ded852 ("rtw88: 8723d: Add 8723DE to Kconfig and Makefile") Tested-by: You-Sheng Yang Signed-off-by: Ping-Ke Shih Signed-off-by: Yan-Hsuan Chuang Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20200529025009.2468-4-yhchuang@realtek.com --- diff --git a/drivers/net/wireless/realtek/rtw88/mac80211.c b/drivers/net/wireless/realtek/rtw88/mac80211.c index 98d2ac22f6f63..c412bc54efde1 100644 --- a/drivers/net/wireless/realtek/rtw88/mac80211.c +++ b/drivers/net/wireless/realtek/rtw88/mac80211.c @@ -341,13 +341,11 @@ static void rtw_ops_bss_info_changed(struct ieee80211_hw *hw, rtw_leave_lps_deep(rtwdev); if (changed & BSS_CHANGED_ASSOC) { - struct rtw_chip_info *chip = rtwdev->chip; enum rtw_net_type net_type; if (conf->assoc) { rtw_coex_connect_notify(rtwdev, COEX_ASSOCIATE_FINISH); net_type = RTW_NET_MGD_LINKED; - chip->ops->phy_calibration(rtwdev); rtwvif->aid = conf->aid; rtw_fw_download_rsvd_page(rtwdev); @@ -663,6 +661,7 @@ static void rtw_ops_mgd_prepare_tx(struct ieee80211_hw *hw, mutex_lock(&rtwdev->mutex); rtw_leave_lps_deep(rtwdev); rtw_coex_connect_notify(rtwdev, COEX_ASSOCIATE_START); + rtw_chip_prepare_tx(rtwdev); mutex_unlock(&rtwdev->mutex); } diff --git a/drivers/net/wireless/realtek/rtw88/main.c b/drivers/net/wireless/realtek/rtw88/main.c index f88a7d2370aa8..0eefafc51c62e 100644 --- a/drivers/net/wireless/realtek/rtw88/main.c +++ b/drivers/net/wireless/realtek/rtw88/main.c @@ -408,6 +408,23 @@ void rtw_set_channel(struct rtw_dev *rtwdev) } rtw_phy_set_tx_power_level(rtwdev, center_chan); + + /* if the channel isn't set for scanning, we will do RF calibration + * in ieee80211_ops::mgd_prepare_tx(). Performing the calibration + * during scanning on each channel takes too long. + */ + if (!test_bit(RTW_FLAG_SCANNING, rtwdev->flags)) + rtwdev->need_rfk = true; +} + +void rtw_chip_prepare_tx(struct rtw_dev *rtwdev) +{ + struct rtw_chip_info *chip = rtwdev->chip; + + if (rtwdev->need_rfk) { + rtwdev->need_rfk = false; + chip->ops->phy_calibration(rtwdev); + } } static void rtw_vif_write_addr(struct rtw_dev *rtwdev, u32 start, u8 *addr) diff --git a/drivers/net/wireless/realtek/rtw88/main.h b/drivers/net/wireless/realtek/rtw88/main.h index 2ae424869f8bd..0841f5fa4bf27 100644 --- a/drivers/net/wireless/realtek/rtw88/main.h +++ b/drivers/net/wireless/realtek/rtw88/main.h @@ -1720,6 +1720,8 @@ struct rtw_dev { struct rtw_fw_state wow_fw; struct rtw_wow_param wow; + bool need_rfk; + /* hci related data, must be last */ u8 priv[] __aligned(sizeof(void *)); }; @@ -1793,6 +1795,7 @@ void rtw_restore_reg(struct rtw_dev *rtwdev, struct rtw_backup_info *bckp, u32 num); void rtw_desc_to_mcsrate(u16 rate, u8 *mcs, u8 *nss); void rtw_set_channel(struct rtw_dev *rtwdev); +void rtw_chip_prepare_tx(struct rtw_dev *rtwdev); void rtw_vif_port_config(struct rtw_dev *rtwdev, struct rtw_vif *rtwvif, u32 config); void rtw_tx_report_purge_timer(struct timer_list *t);