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rtw88: fix idle mode flow for hw scan

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Upon hw scan completion, idle mode is not re-entered. This might
increase power consumption under no link mode. Fix this by adding the
re-enter flow. We need another work for this since enter_ips waits
for c2h_work to finish, which might lead to deadlock if caller is in
the same work.

Fixes: 10d162b2ed ("rtw88: 8822c: add ieee80211_ops::hw_scan")
Signed-off-by: Po-Hao Huang <phhuang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220121070813.9656-3-pkshih@realtek.com
This commit is contained in:
Po-Hao Huang 2022-01-21 15:08:12 +08:00 • committed by Kalle Valo
parent a12f809968
commit c17f27167b
4 changed files with 23 additions and 4 deletions
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2
drivers/net/wireless/realtek/rtw88/fw.c
View file

@ -2030,7 +2030,7 @@ void rtw_hw_scan_complete(struct rtw_dev *rtwdev, struct ieee80211_vif *vif,
rtwdev->hal.rcr |= BIT_CBSSID_BCN;
rtw_write32(rtwdev, REG_RCR, rtwdev->hal.rcr);
rtw_core_scan_complete(rtwdev, vif);
rtw_core_scan_complete(rtwdev, vif, true);
ieee80211_wake_queues(rtwdev->hw);
ieee80211_scan_completed(rtwdev->hw, &info);

5
drivers/net/wireless/realtek/rtw88/mac80211.c
View file

@ -72,6 +72,9 @@ static int rtw_ops_config(struct ieee80211_hw *hw, u32 changed)
struct rtw_dev *rtwdev = hw->priv;
int ret = 0;
/* let previous ips work finish to ensure we don't leave ips twice */
cancel_work_sync(&rtwdev->ips_work);
mutex_lock(&rtwdev->mutex);
rtw_leave_lps_deep(rtwdev);
@ -614,7 +617,7 @@ static void rtw_ops_sw_scan_complete(struct ieee80211_hw *hw,
struct rtw_dev *rtwdev = hw->priv;
mutex_lock(&rtwdev->mutex);
rtw_core_scan_complete(rtwdev, vif);
rtw_core_scan_complete(rtwdev, vif, false);
mutex_unlock(&rtwdev->mutex);
}

16
drivers/net/wireless/realtek/rtw88/main.c
View file

@ -272,6 +272,15 @@ static void rtw_c2h_work(struct work_struct *work)
}
}
static void rtw_ips_work(struct work_struct *work)
{
struct rtw_dev *rtwdev = container_of(work, struct rtw_dev, ips_work);
mutex_lock(&rtwdev->mutex);
rtw_enter_ips(rtwdev);
mutex_unlock(&rtwdev->mutex);
}
static u8 rtw_acquire_macid(struct rtw_dev *rtwdev)
{
unsigned long mac_id;
@ -1339,7 +1348,8 @@ void rtw_core_scan_start(struct rtw_dev *rtwdev, struct rtw_vif *rtwvif,
set_bit(RTW_FLAG_SCANNING, rtwdev->flags);
}
void rtw_core_scan_complete(struct rtw_dev *rtwdev, struct ieee80211_vif *vif)
void rtw_core_scan_complete(struct rtw_dev *rtwdev, struct ieee80211_vif *vif,
bool hw_scan)
{
struct rtw_vif *rtwvif = (struct rtw_vif *)vif->drv_priv;
u32 config = 0;
@ -1354,6 +1364,9 @@ void rtw_core_scan_complete(struct rtw_dev *rtwdev, struct ieee80211_vif *vif)
rtw_vif_port_config(rtwdev, rtwvif, config);
rtw_coex_scan_notify(rtwdev, COEX_SCAN_FINISH);
if (rtwvif->net_type == RTW_NET_NO_LINK && hw_scan)
ieee80211_queue_work(rtwdev->hw, &rtwdev->ips_work);
}
int rtw_core_start(struct rtw_dev *rtwdev)
@ -1919,6 +1932,7 @@ int rtw_core_init(struct rtw_dev *rtwdev)
INIT_DELAYED_WORK(&coex->wl_ccklock_work, rtw_coex_wl_ccklock_work);
INIT_WORK(&rtwdev->tx_work, rtw_tx_work);
INIT_WORK(&rtwdev->c2h_work, rtw_c2h_work);
INIT_WORK(&rtwdev->ips_work, rtw_ips_work);
INIT_WORK(&rtwdev->fw_recovery_work, rtw_fw_recovery_work);
INIT_WORK(&rtwdev->ba_work, rtw_txq_ba_work);
skb_queue_head_init(&rtwdev->c2h_queue);

4
drivers/net/wireless/realtek/rtw88/main.h
View file

@ -1960,6 +1960,7 @@ struct rtw_dev {
/* c2h cmd queue & handler work */
struct sk_buff_head c2h_queue;
struct work_struct c2h_work;
struct work_struct ips_work;
struct work_struct fw_recovery_work;
/* used to protect txqs list */
@ -2101,7 +2102,8 @@ void rtw_tx_report_purge_timer(struct timer_list *t);
void rtw_update_sta_info(struct rtw_dev *rtwdev, struct rtw_sta_info *si);
void rtw_core_scan_start(struct rtw_dev *rtwdev, struct rtw_vif *rtwvif,
const u8 *mac_addr, bool hw_scan);
void rtw_core_scan_complete(struct rtw_dev *rtwdev, struct ieee80211_vif *vif);
void rtw_core_scan_complete(struct rtw_dev *rtwdev, struct ieee80211_vif *vif,
bool hw_scan);
int rtw_core_start(struct rtw_dev *rtwdev);
void rtw_core_stop(struct rtw_dev *rtwdev);
int rtw_chip_info_setup(struct rtw_dev *rtwdev);