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Date: Mon, 24 Jan 2022 19:35:03 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Leon Yen <leon.yen@...iatek.com>,
Sean Wang <sean.wang@...iatek.com>,
Felix Fietkau <nbd@....name>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.16 0314/1039] mt76: mt7921s: fix the device cannot sleep deeply in suspend
From: Sean Wang <sean.wang@...iatek.com>
[ Upstream commit 5ad4faca7690a88b4529238c757b6b8ead8056ec ]
According to the MT7921S firmware, the cmd MCU_UNI_CMD_HIF_CTRL have to
be last MCU command to execute in suspend handler and all data traffic
have to be stopped before the cmd MCU_UNI_CMD_HIF_CTRL starts as well
in order that mt7921 can successfully fall into the deep sleep mode.
Where we reuse the flag MT76_STATE_SUSPEND and avoid creating
another global flag to stop all of the traffic onto the SDIO bus.
Fixes: 48fab5bbef40 ("mt76: mt7921: introduce mt7921s support")
Reported-by: Leon Yen <leon.yen@...iatek.com>
Signed-off-by: Sean Wang <sean.wang@...iatek.com>
Signed-off-by: Felix Fietkau <nbd@....name>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
.../wireless/mediatek/mt76/mt76_connac_mcu.c | 2 +-
.../net/wireless/mediatek/mt76/mt7921/main.c | 3 --
.../net/wireless/mediatek/mt76/mt7921/sdio.c | 34 ++++++++++++-------
drivers/net/wireless/mediatek/mt76/sdio.c | 3 +-
.../net/wireless/mediatek/mt76/sdio_txrx.c | 3 +-
5 files changed, 27 insertions(+), 18 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c b/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c
index 26b4b875dcc02..61c4c86e79c88 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c
@@ -2461,7 +2461,7 @@ void mt76_connac_mcu_set_suspend_iter(void *priv, u8 *mac,
struct ieee80211_vif *vif)
{
struct mt76_phy *phy = priv;
- bool suspend = test_bit(MT76_STATE_SUSPEND, &phy->state);
+ bool suspend = !test_bit(MT76_STATE_RUNNING, &phy->state);
struct ieee80211_hw *hw = phy->hw;
struct cfg80211_wowlan *wowlan = hw->wiphy->wowlan_config;
int i;
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/main.c b/drivers/net/wireless/mediatek/mt76/mt7921/main.c
index e022251b40069..0b2a6b7f22eae 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/main.c
@@ -1242,8 +1242,6 @@ static int mt7921_suspend(struct ieee80211_hw *hw,
mt7921_mutex_acquire(dev);
clear_bit(MT76_STATE_RUNNING, &phy->mt76->state);
-
- set_bit(MT76_STATE_SUSPEND, &phy->mt76->state);
ieee80211_iterate_active_interfaces(hw,
IEEE80211_IFACE_ITER_RESUME_ALL,
mt76_connac_mcu_set_suspend_iter,
@@ -1262,7 +1260,6 @@ static int mt7921_resume(struct ieee80211_hw *hw)
mt7921_mutex_acquire(dev);
set_bit(MT76_STATE_RUNNING, &phy->mt76->state);
- clear_bit(MT76_STATE_SUSPEND, &phy->mt76->state);
ieee80211_iterate_active_interfaces(hw,
IEEE80211_IFACE_ITER_RESUME_ALL,
mt76_connac_mcu_set_suspend_iter,
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/sdio.c b/drivers/net/wireless/mediatek/mt76/mt7921/sdio.c
index 5fee489c7a998..5c88b6b8d0979 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/sdio.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/sdio.c
@@ -206,6 +206,8 @@ static int mt7921s_suspend(struct device *__dev)
int err;
pm->suspended = true;
+ set_bit(MT76_STATE_SUSPEND, &mdev->phy.state);
+
cancel_delayed_work_sync(&pm->ps_work);
cancel_work_sync(&pm->wake_work);
@@ -213,10 +215,6 @@ static int mt7921s_suspend(struct device *__dev)
if (err < 0)
goto restore_suspend;
- err = mt76_connac_mcu_set_hif_suspend(mdev, true);
- if (err)
- goto restore_suspend;
-
/* always enable deep sleep during suspend to reduce
* power consumption
*/
@@ -224,34 +222,45 @@ static int mt7921s_suspend(struct device *__dev)
mt76_txq_schedule_all(&dev->mphy);
mt76_worker_disable(&mdev->tx_worker);
- mt76_worker_disable(&mdev->sdio.txrx_worker);
mt76_worker_disable(&mdev->sdio.status_worker);
- mt76_worker_disable(&mdev->sdio.net_worker);
cancel_work_sync(&mdev->sdio.stat_work);
clear_bit(MT76_READING_STATS, &dev->mphy.state);
-
mt76_tx_status_check(mdev, true);
- err = mt7921_mcu_fw_pmctrl(dev);
+ mt76_worker_schedule(&mdev->sdio.txrx_worker);
+ wait_event_timeout(dev->mt76.sdio.wait,
+ mt76s_txqs_empty(&dev->mt76), 5 * HZ);
+
+ /* It is supposed that SDIO bus is idle at the point */
+ err = mt76_connac_mcu_set_hif_suspend(mdev, true);
if (err)
goto restore_worker;
+ mt76_worker_disable(&mdev->sdio.txrx_worker);
+ mt76_worker_disable(&mdev->sdio.net_worker);
+
+ err = mt7921_mcu_fw_pmctrl(dev);
+ if (err)
+ goto restore_txrx_worker;
+
sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
return 0;
+restore_txrx_worker:
+ mt76_worker_enable(&mdev->sdio.net_worker);
+ mt76_worker_enable(&mdev->sdio.txrx_worker);
+ mt76_connac_mcu_set_hif_suspend(mdev, false);
+
restore_worker:
mt76_worker_enable(&mdev->tx_worker);
- mt76_worker_enable(&mdev->sdio.txrx_worker);
mt76_worker_enable(&mdev->sdio.status_worker);
- mt76_worker_enable(&mdev->sdio.net_worker);
if (!pm->ds_enable)
mt76_connac_mcu_set_deep_sleep(mdev, false);
- mt76_connac_mcu_set_hif_suspend(mdev, false);
-
restore_suspend:
+ clear_bit(MT76_STATE_SUSPEND, &mdev->phy.state);
pm->suspended = false;
return err;
@@ -266,6 +275,7 @@ static int mt7921s_resume(struct device *__dev)
int err;
pm->suspended = false;
+ clear_bit(MT76_STATE_SUSPEND, &mdev->phy.state);
err = mt7921_mcu_drv_pmctrl(dev);
if (err < 0)
diff --git a/drivers/net/wireless/mediatek/mt76/sdio.c b/drivers/net/wireless/mediatek/mt76/sdio.c
index c99acc21225e1..b0bc7be0fb1fc 100644
--- a/drivers/net/wireless/mediatek/mt76/sdio.c
+++ b/drivers/net/wireless/mediatek/mt76/sdio.c
@@ -479,7 +479,8 @@ static void mt76s_status_worker(struct mt76_worker *w)
resched = true;
if (dev->drv->tx_status_data &&
- !test_and_set_bit(MT76_READING_STATS, &dev->phy.state))
+ !test_and_set_bit(MT76_READING_STATS, &dev->phy.state) &&
+ !test_bit(MT76_STATE_SUSPEND, &dev->phy.state))
queue_work(dev->wq, &dev->sdio.stat_work);
} while (nframes > 0);
diff --git a/drivers/net/wireless/mediatek/mt76/sdio_txrx.c b/drivers/net/wireless/mediatek/mt76/sdio_txrx.c
index 649a56790b89d..801590a0a334f 100644
--- a/drivers/net/wireless/mediatek/mt76/sdio_txrx.c
+++ b/drivers/net/wireless/mediatek/mt76/sdio_txrx.c
@@ -317,7 +317,8 @@ void mt76s_txrx_worker(struct mt76_sdio *sdio)
if (ret > 0)
nframes += ret;
- if (test_bit(MT76_MCU_RESET, &dev->phy.state)) {
+ if (test_bit(MT76_MCU_RESET, &dev->phy.state) ||
+ test_bit(MT76_STATE_SUSPEND, &dev->phy.state)) {
if (!mt76s_txqs_empty(dev))
continue;
else
--
2.34.1
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