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

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Message-ID: <6d41bc00602c33ffbf68781f563ff2e6c6915a3e.camel@gmail.com>
Date: Fri, 17 Oct 2025 17:37:34 +0200
From: Klaus Kudielka <klaus.kudielka@...il.com>
To: Jeff Johnson <jeff.johnson@....qualcomm.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: [REGRESSION] ath10k fails initialization, bisected to "wifi:
 ath10k: avoid unnecessary wait for service ready message"

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


dmesg output after loading ath10k_pci

[    5.895939] ath10k_pci 0000:02:00.0: pci irq msi oper_irq_mode 2 irq_mode 0 reset_mode 0
[    6.152971] ath10k_pci 0000:02:00.0: qca988x hw2.0 target 0x4100016c chip_id 0x043202ff sub 0000:0000
[    6.152994] ath10k_pci 0000:02:00.0: kconfig debug 0 debugfs 0 tracing 0 dfs 1 testmode 0
[    6.154343] ath10k_pci 0000:02:00.0: firmware ver 10.2.4-1.0-00047 api 5 features no-p2p,raw-mode,mfp,allows-mesh-bcast crc32 35bd9258
[    6.214165] ath10k_pci 0000:02:00.0: board_file api 1 bmi_id N/A crc32 bebc7c08

So far so good, but then come the problematic error messages:

[   12.509390] ath10k_pci 0000:02:00.0: wmi unified ready event not received
[   12.580885] ath10k_pci 0000:02:00.0: could not init core (-110)
[   12.586891] ath10k_pci 0000:02:00.0: could not probe fw (-110)

And the corresponding netdevice does not appear at all.


---


If I revert said commit (on top of current mainline), all is good again:

[    6.112174] ath10k_pci 0000:02:00.0: pci irq msi oper_irq_mode 2 irq_mode 0 reset_mode 0
[    6.264184] ath10k_pci 0000:02:00.0: qca988x hw2.0 target 0x4100016c chip_id 0x043202ff sub 0000:0000
[    6.264199] ath10k_pci 0000:02:00.0: kconfig debug 0 debugfs 0 tracing 0 dfs 1 testmode 0
[    6.265591] ath10k_pci 0000:02:00.0: firmware ver 10.2.4-1.0-00047 api 5 features no-p2p,raw-mode,mfp,allows-mesh-bcast crc32 35bd9258
[    6.298955] ath10k_pci 0000:02:00.0: board_file api 1 bmi_id N/A crc32 bebc7c08
[    7.458285] ath10k_pci 0000:02:00.0: htt-ver 2.1 wmi-op 5 htt-op 2 cal otp max-sta 128 raw 0 hwcrypto 1
[    8.910074] ath10k_pci 0000:02:00.0: pdev param 0 not supported by firmware
[    8.934074] ath10k_pci 0000:02:00.0 wlan1: entered allmulticast mode
[    8.934187] ath10k_pci 0000:02:00.0 wlan1: entered promiscuous mode


Best regards, Klaus


#regzbot introduced: 51a73f1b2e56b0324b4a3bb8cebc4221b5be4c7a ("wifi: ath10k: avoid unnecessary wait for service ready message")