linux-kernel - Asus eeepc 1008HA suspend issue and mac80211 suspend corner case

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Message-ID: <19248.19829.293087.367661@gargle.gargle.HOWL>
Date:	Tue, 22 Dec 2009 10:09:17 +0530
From:	Sujith <Sujith.Manoharan@...eros.com>
To:	Luis Rodriguez <lrodriguez@...eros.com>
CC:	"linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Alan Jenkins <alan-jenkins@...fmail.co.uk>
Subject: Asus eeepc 1008HA suspend issue and mac80211 suspend corner case

Luis Rodriguez wrote:
> That log can be found here:
> 
> http://bombadil.infradead.org/~mcgrof/logs/2.6.31-with-2.6.32-wireless/irq-disabled.txt

Thanks for the log.
It's a bug in ath9k, related to PowerSave.

Can you test this patch ?

diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 3f5b887..419c382 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -2504,6 +2504,9 @@ static void ath9k_stop(struct ieee80211_hw *hw)
 		return; /* another wiphy still in use */
 	}
 
+	/* Ensure HW is awake when we try to shut it down. */
+	ath9k_ps_wakeup(sc);
+
 	if (ah->btcoex_hw.enabled) {
 		ath9k_hw_btcoex_disable(ah);
 		if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
@@ -2524,8 +2527,10 @@ static void ath9k_stop(struct ieee80211_hw *hw)
 	/* disable HAL and put h/w to sleep */
 	ath9k_hw_disable(ah);
 	ath9k_hw_configpcipowersave(ah, 1, 1);
-	ath9k_setpower(sc, ATH9K_PM_FULL_SLEEP);
+	ath9k_ps_restore(sc);
 
+	/* Finally, put the chip in FULL SLEEP mode */
+	ath9k_setpower(sc, ATH9K_PM_FULL_SLEEP);
 	sc->sc_flags |= SC_OP_INVALID;
 
 	mutex_unlock(&sc->mutex);

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