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

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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: ec7bd7b4a9 ("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>
This commit is contained in:
Sean Wang 2021-05-10 23:14:51 +08:00 committed by Felix Fietkau
parent 2c80c02a68
commit 4bfa291251
1 changed files with 4 additions and 0 deletions
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4
drivers/net/wireless/mediatek/mt76/mt76_connac.h
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@ -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);