From: Thomas Pedersen thomas@adapt-ip.com
[ Upstream commit 08a5bdde3812993cb8eb7aa9124703df0de28e4b ]
Commit 7b6ddeaf27ec ("mac80211: use QoS NDP for AP probing") let STAs send QoS Null frames as PS triggers if the AP was a QoS STA. However, the mac80211 PS stack relies on an interface flag IEEE80211_STA_NULLFUNC_ACKED for determining trigger frame ACK, which was not being set for acked non-QoS Null frames. The effect is an inability to trigger hardware sleep via IEEE80211_CONF_PS since the QoS Null frame was seemingly never acked.
This bug only applies to drivers which set both IEEE80211_HW_REPORTS_TX_ACK_STATUS and IEEE80211_HW_PS_NULLFUNC_STACK.
Detect the acked QoS Null frame to restore STA power save.
Fixes: 7b6ddeaf27ec ("mac80211: use QoS NDP for AP probing") Signed-off-by: Thomas Pedersen thomas@adapt-ip.com Link: https://lore.kernel.org/r/20191119053538.25979-4-thomas@adapt-ip.com Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- net/mac80211/status.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/mac80211/status.c b/net/mac80211/status.c index 534a604..f895c65 100644 --- a/net/mac80211/status.c +++ b/net/mac80211/status.c @@ -867,7 +867,8 @@ static void __ieee80211_tx_status(struct ieee80211_hw *hw, I802_DEBUG_INC(local->dot11FailedCount); }
- if (ieee80211_is_nullfunc(fc) && ieee80211_has_pm(fc) && + if ((ieee80211_is_nullfunc(fc) || ieee80211_is_qos_nullfunc(fc)) && + ieee80211_has_pm(fc) && ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && !(info->flags & IEEE80211_TX_CTL_INJECTED) && local->ps_sdata && !(local->scanning)) {