Re: ath10k: wmi service ready event not received

[Ben Greear <greearb@candelatech.com>]

On 05/10/2019 05:28 AM, Linus Torvalds wrote:
> Hmm.
>
> I have a nice new laptop, and it works fine. Except today it lost
> wireless, and I have no idea why.
>
> It's not happened before (but it's fairly new and I'm actually on my
> first trip with it), so I don't know how common this is, but the
> kernel messages seem to say that the cause of it was
>
>   ath10k_pci 0000:02:00.0: wmi service ready event not received
>   ath10k_pci 0000:02:00.0: could not init core (-110)
>   ath10k_pci 0000:02:00.0: could not probe fw (-110)
>
> and then nothing works. -110 is ETIMEDOUT, fwiw.
>
> Rebooting got wireless back. It's possible I could have done something
> less drastic, but I was thinking that it would be the new kernel and
> rebooted into an older version. But then rebooting into the new one
> afterwards (double-checking before starting a bisect) and it all
> worked.
>
> Is there anything I can do to debug this if it happens again?

Please provide 'lspci' or other info on the NIC chipset, for reference.

Sometimes a work-around is:

rmmod ath10k_pci ath10k_core; modprobe ath10k_pci

Sometimes you will get a firmware register dump in this crash case, and then someone
from QCA might can get a backtrace if you post that with the chipset info and
such (or if it is one of the NICs my ath10k-ct firmware supports and you can reproduce
an issue with that firmware, then I can debug it).

Thanks,
Ben

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

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