mt76: connac: fw_own rely on all packet memory all being free

If the device is MMIO-based, we must ensure all TxD/TxP on the host
memory all being consumed by the device prior to safely switching to
fw_own state.

Fixes: ec7bd7b4a9c0 ("mt76: connac: check wake refcount in mcu_fw_pmctrl")
Reviewed-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

diff --git a/drivers/net/wireless/mediatek/mt76/mt76_connac.h b/drivers/net/wireless/mediatek/mt76/mt76_connac.h
index 6c889b9..337c5ec 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/mt76_connac.h
+++ b/drivers/net/wireless/mediatek/mt76/mt76_connac.h
@@ -127,8 +127,12 @@ mt76_connac_pm_unref(struct mt76_connac_pm *pm)
 static inline bool
 mt76_connac_skip_fw_pmctrl(struct mt76_phy *phy, struct mt76_connac_pm *pm)
 {
+       struct mt76_dev *dev = phy->dev;
        bool ret;
 
+       if (dev->token_count)
+               return true;
+
        spin_lock_bh(&pm->wake.lock);
        ret = pm->wake.count || test_and_set_bit(MT76_STATE_PM, &phy->state);
        spin_unlock_bh(&pm->wake.lock);