From: Ping-Ke Shih <pkshih@realtek.com>
To: <tony0620emma@gmail.com>, <kvalo@kernel.org>
Cc: <linux-wireless@vger.kernel.org>, <usama.anjum@collabora.com>,
<phhuang@realtek.com>
Subject: [PATCH 2/3] rtw88: fix idle mode flow for hw scan
Date: Fri, 21 Jan 2022 15:08:12 +0800 [thread overview]
Message-ID: <20220121070813.9656-3-pkshih@realtek.com> (raw)
In-Reply-To: <20220121070813.9656-1-pkshih@realtek.com>
From: Po-Hao Huang <phhuang@realtek.com>
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: 10d162b2ed39 ("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>
---
drivers/net/wireless/realtek/rtw88/fw.c | 2 +-
drivers/net/wireless/realtek/rtw88/mac80211.c | 5 ++++-
drivers/net/wireless/realtek/rtw88/main.c | 16 +++++++++++++++-
drivers/net/wireless/realtek/rtw88/main.h | 4 +++-
4 files changed, 23 insertions(+), 4 deletions(-)
diff --git a/drivers/net/wireless/realtek/rtw88/fw.c b/drivers/net/wireless/realtek/rtw88/fw.c
index b56dc43229d28..a631042753eab 100644
--- a/drivers/net/wireless/realtek/rtw88/fw.c
+++ b/drivers/net/wireless/realtek/rtw88/fw.c
@@ -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);
diff --git a/drivers/net/wireless/realtek/rtw88/mac80211.c b/drivers/net/wireless/realtek/rtw88/mac80211.c
index ae7d97de5fdf4..647d2662955ba 100644
--- a/drivers/net/wireless/realtek/rtw88/mac80211.c
+++ b/drivers/net/wireless/realtek/rtw88/mac80211.c
@@ -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);
}
diff --git a/drivers/net/wireless/realtek/rtw88/main.c b/drivers/net/wireless/realtek/rtw88/main.c
index 38252113c4a87..39c223a2e3e2d 100644
--- a/drivers/net/wireless/realtek/rtw88/main.c
+++ b/drivers/net/wireless/realtek/rtw88/main.c
@@ -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);
diff --git a/drivers/net/wireless/realtek/rtw88/main.h b/drivers/net/wireless/realtek/rtw88/main.h
index dc1cd9bd4b8a3..36e1e408933db 100644
--- a/drivers/net/wireless/realtek/rtw88/main.h
+++ b/drivers/net/wireless/realtek/rtw88/main.h
@@ -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);
--
2.25.1
next prev parent reply other threads:[~2022-01-21 7:08 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-21 7:08 [PATCH 0/3] rtw88: some fixes of hw_scan Ping-Ke Shih
2022-01-21 7:08 ` [PATCH 1/3] rtw88: check for validity before using a pointer Ping-Ke Shih
2022-01-31 15:47 ` Kalle Valo
2022-01-21 7:08 ` Ping-Ke Shih [this message]
2022-01-21 7:08 ` [PATCH 3/3] rtw88: fix memory overrun and memory leak during hw_scan Ping-Ke Shih
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