Commit c6c539f0 authored by Felix Fietkau's avatar Felix Fietkau Committed by John W. Linville
Browse files

ath9k: optimize ath9k_ps_restore 



ath_hw_cycle_counters_update only needs to be called if the power state
changes. Most of the time this does not happen, even when ps_usecount
goes down to 0.

Signed-off-by: default avatarFelix Fietkau <nbd@openwrt.org>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 66ac69c8

drivers/net/wireless/ath/ath9k/main.c

+11 −6
Original line number Diff line number Diff line
@@ -111,23 +111,28 @@ void ath9k_ps_wakeup(struct ath_softc *sc) 
void ath9k_ps_restore(struct ath_softc *sc)

{

	struct ath_common *common = ath9k_hw_common(sc->sc_ah);

	enum ath9k_power_mode mode;

	unsigned long flags;



	spin_lock_irqsave(&sc->sc_pm_lock, flags);

	if (--sc->ps_usecount != 0)

		goto unlock;



	spin_lock(&common->cc_lock);

	ath_hw_cycle_counters_update(common);

	spin_unlock(&common->cc_lock);



	if (sc->ps_idle)

		ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_FULL_SLEEP);

		mode = ATH9K_PM_FULL_SLEEP;

	else if (sc->ps_enabled &&

		 !(sc->ps_flags & (PS_WAIT_FOR_BEACON |

			      PS_WAIT_FOR_CAB |

			      PS_WAIT_FOR_PSPOLL_DATA |

			      PS_WAIT_FOR_TX_ACK)))

		mode = ATH9K_PM_NETWORK_SLEEP;

	else

		goto unlock;



	spin_lock(&common->cc_lock);

	ath_hw_cycle_counters_update(common);

	spin_unlock(&common->cc_lock);



	ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_NETWORK_SLEEP);



 unlock: