linux-kernel - Re: [REGRESSION] ath10k fails initialization, bisected to "wifi: ath10k: avoid unnecessary wait for service ready message"

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Message-ID: <76d4235d-db4e-40f4-9ede-8cb536b82fbd@oss.qualcomm.com>
Date: Fri, 17 Oct 2025 08:57:39 -0700
From: Jeff Johnson <jeff.johnson@....qualcomm.com>
To: Klaus Kudielka <klaus.kudielka@...il.com>,
        Jeff Johnson <jjohnson@...nel.org>, Kalle Valo <kvalo@...nel.org>,
        Baochen Qiang <quic_bqiang@...cinc.com>,
        Baochen Qiang <baochen.qiang@....qualcomm.com>
Cc: linux-wireless@...r.kernel.org, ath10k@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Paul Menzel <pmenzel@...gen.mpg.de>,
        regressions@...ts.linux.dev
Subject: Re: [REGRESSION] ath10k fails initialization, bisected to "wifi:
 ath10k: avoid unnecessary wait for service ready message"

On 10/17/2025 8:37 AM, Klaus Kudielka wrote:
> On Thu, 2025-09-18 at 16:47 -0700, Jeff Johnson wrote:
>>
>> On Mon, 11 Aug 2025 17:26:45 +0800, Baochen Qiang wrote:
>>> Commit e57b7d62a1b2 ("wifi: ath10k: poll service ready message before
>>> failing") works around the failure in waiting for the service ready
>>> message by active polling. Note the polling is triggered after initial
>>> wait timeout, which means that the wait-till-timeout can not be avoided
>>> even the message is ready.
>>>
>>> A possible fix is to do polling once before wait as well, however this
>>> can not handle the race that the message arrives right after polling.
>>> So the solution is to do periodic polling until timeout.
>>>
>>> [...]
>>
>> Applied, thanks!
>>
>> [1/1] wifi: ath10k: avoid unnecessary wait for service ready message
>>       commit: 51a73f1b2e56b0324b4a3bb8cebc4221b5be4c7a
>>
>> Best regards,
> 
> 
> Unfortunately, this particular commit completely breaks the ath10k driver in my setup.
> 
> 
> Hardware:
> - Turris Omnia (arch/arm/boot/dts/marvell/armada-385-turris-omnia.dts)
> - Wifi card (output from lspci): Network controller: Qualcomm Atheros QCA986x/988x 802.11ac Wireless Network Adapter

This issue was previously reported with that particular chipset.
This is currently being tracked at:
https://bugzilla.kernel.org/show_bug.cgi?id=220671

It may be useful to supply your information as a separate record to that bug.

/jeff