Date: Fri, 21 Oct 2011 22:20:38 +0200
From: Clemens Buchacher <drizzd@aon.at>
To: Adrian Chadd <adrian@freebsd.org>
Cc: Mohammed Shafi <shafi.wireless@gmail.com>,
	linux-wireless@vger.kernel.org,
	ath9k-devel <ath9k-devel@lists.ath9k.org>
Subject: Re: ath9k: irq storm after suspend/resume
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On Fri, Oct 21, 2011 at 10:10:21PM +0800, Adrian Chadd wrote:
> 
> I assume you have disabled the NIC power save option. Not just APSM,
> etc, but the powersave options in iw. I don't know what they are,
> sorry, only that they exist.

I am not sure if that's what you mean, but if I set "iwconfig wlan0
power off" it makes no difference.

> I suggest modifying ath_intr() so if there is an interrupt storm,
> disable _all_ sources of interrupts (ie, set sync_cause, async_cause
> to 0, set imr to 0, set ier to 0) and see if it continues occuring.

They keep coming with this too.

> If the interrupt storm continue occuring, try putting the whole NIC to
> sleep entirely (ie, call pcipowersave to put the NIC to sleep, then
> make sure the NIC -stays- asleep somehow, ie so nothing else tries
> waking it up - I don't know how to do this, likely you'll have to
> clear some interface flag so the rest of the ath9k and 802.11 stack
> thinks the nic is actually down for the count) and see if you're still
> getting spurious interrupts.

I am now calling

 ath9k_hw_ops(sc->sc_ah)->config_pci_powersave(sc->sc_ah, true);
 ath9k_setpower(sc, ATH9K_PM_FULL_SLEEP);

right before request_irq, and the interrupts still come. And the
device is in FULL_SLEEP the whole time, at least according to
ah->power_mode.

Clemens