[ath9k-devel] ath9k deadbeef

[Ben Greear <greearb@candelatech.com>]

On 01/07/2011 08:55 AM, Senthilkumar Balasubramanian wrote:
> On Fri, Jan 7, 2011 at 10:04 PM, Brian Prodoehl<bprodoehl@gmail.com>  wrote:
>> What's the story on reading a register in ath9k and getting
>> 0xDEADBEEF?  I know this has come up before, and whatever the symptom
>
> If you are seeing DEADBEEF then the chip is in SLEEP state and i believe
> there is some race condition still where we need to handle
> sleep/wakeup properly.
>
> Can you please provide us the steps to reproduce this issue consistently?
>
> I assume you are using the latest wireless testing, please confirm.

For me:  Create 60 stations, bring them up, rmmod ath9k modules.

Watch DMA fail to stop and very often DEADBEEF register reads.

Probably a lot less stations would do the same, but it happens very
often with 60.

Doesn't seem to do any lasting harm, however...  The failure to
stop DMA *might* be the cause of the rmmod corruption crash I reported
yesterday, but not certain.

I am using latest wireless-testing, but have seen this same general
problem for months.

Thanks,
Ben


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