Re: Warnings/errors in use with a QCA989x card

From: Ben Greear <greearb@candelatech.com>
To: Matthew Robbetts <wingfeathera@gmail.com>
Cc: Michal Kazior <michal.kazior@tieto.com>,
	"ath10k@lists.infradead.org" <ath10k@lists.infradead.org>
Subject: Re: Warnings/errors in use with a QCA989x card
Date: Fri, 05 Jun 2015 08:52:06 -0700	[thread overview]
Message-ID: <5571C5A6.4080809@candelatech.com> (raw)
In-Reply-To: <CA+BoTQm735L-TQ0ZjSZ2gHud_AwvP+kZAh+Wc4iQtaGSiC2GLw@mail.gmail.com>

On 06/04/2015 10:17 PM, Michal Kazior wrote:
> On 5 June 2015 at 03:52, Matthew Robbetts <wingfeathera@gmail.com> wrote:

>> [Thu Jun  4 11:07:08 2015] ath10k_pci 0000:02:00.0: SWBA overrun on vdev 0, skipped old beacon
>> [Thu Jun  4 11:07:08 2015] ath10k_pci 0000:02:00.0: SWBA overrun on vdev 0, skipped old beacon
>> [Thu Jun  4 11:07:08 2015] ath10k_pci 0000:02:00.0: SWBA overrun on vdev 0, skipped old beacon
>> [Thu Jun  4 11:07:08 2015] ath10k_pci 0000:02:00.0: SWBA overrun on vdev 0, skipped old beacon
>> [Thu Jun  4 11:07:08 2015] ath10k_pci 0000:02:00.0: SWBA overrun on vdev 0, skipped old beacon
>> [Thu Jun  4 11:07:08 2015] ath10k_pci 0000:02:00.0: SWBA overrun on vdev 0, skipped old beacon
>> [Thu Jun  4 11:07:09 2015] ath10k_pci 0000:02:00.0: SWBA overrun on vdev 0, skipped old beacon
>> [Thu Jun  4 11:07:09 2015] ath10k_pci 0000:02:00.0: SWBA overrun on vdev 0, skipped old beacon
>> [Thu Jun  4 11:07:09 2015] ath10k_pci 0000:02:00.0: SWBA overrun on vdev 0, skipped old beacon
>> [Thu Jun  4 11:07:09 2015] ath10k_pci 0000:02:00.0: failed to transmit management frame via WMI: -11
>> [Thu Jun  4 12:05:32 2015] ath10k_warn: 19 callbacks suppressed
>> [Thu Jun  4 12:05:32 2015] ath10k_pci 0000:02:00.0: Spurious quick kickout for STA 04:db:56:e1:65:2f
>> [Thu Jun  4 12:55:54 2015] device wlp2s0 left promiscuous mode
> 
> This is the dreaded tx credit starvation.

I have some fixes and work-arounds related to this issue in my kernels and CT firmware.

Possibly it would work better for you:

http://www.candelatech.com/ath10k.php

The beta-14 firmware is probably best at this point..I'll promote it to official
release soon.

> In some cases if disassoc+deauth is sent and target station is asleep
> and unresponsive it'll cause firmware to stall causing ath10k timeouts
> during sta_state station removal. Due to insufficient credits beacons
> can't be sent for ~10 seconds, sta_state station removal fails causing
> mac80211 call trace splat and later spurious kickout events because
> peer was never removed from firmware.
> 
> There's no easy/sane fix for that, yet.

I thought the newer upstream firmware had
support for mgt frames over normal packet transport instead of over
the WMI management interface?  Wouldn't that fix things?

Thanks,
Ben

> 
> You can read more on the subject:
> 
>  http://thread.gmane.org/gmane.linux.kernel.wireless.general/121954
> http://thread.gmane.org/gmane.linux.drivers.ath10k.devel/638
> 
> 
> Michał
> 
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> 

-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com

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