ROCK 5B/5B+ RTL8852BE probe failure on v6.18-rc

[FUKAUMI Naoki]

Hi Manivannan,

Thank you for your reply.

On 10/21/25 20:02, Manivannan Sadhasivam wrote:
> On Tue, Oct 21, 2025 at 07:12:21PM +0900, FUKAUMI Naoki wrote:
>> Hi,
>>
>> I've observed an issue where the RTL8852BE fails to probe on the ROCK 5B and
>> ROCK 5B+ using Linux v6.18-rc.
>>
>> [    7.719288] rtw89_8852be 0002:21:00.0: loaded firmware
>> rtw89/rtw8852b_fw-1.bin
>> [    7.720192] rtw89_8852be 0002:21:00.0: enabling device (0000 -> 0003)
>> [    7.728596] rtw89_8852be 0002:21:00.0: Firmware version 0.29.29.5
>> (da87cccd), cmd version 0, type 5
>> [    7.729407] rtw89_8852be 0002:21:00.0: Firmware version 0.29.29.5
>> (da87cccd), cmd version 0, type 3
>> [   11.420623] rtw89_8852be 0002:21:00.0: failed to dump efuse physical map
>> [   11.422859] rtw89_8852be 0002:21:00.0: failed to setup chip information
>> [   11.425273] rtw89_8852be 0002:21:00.0: probe with driver rtw89_8852be
>> failed with error -16
>>
>> This issue does not reproduce on v6.16. The issue does not reproduce with
>> the MT7921E or the AX210. Furthermore, the issue does not reproduce on the
>> ROCK 5A or the ROCK 5 ITX+.
>>
>> The issue appears not to reproduce in or prior to commit 14bed9bc81ba. The
>> issue reproduces, albeit with a low incidence rate, after commit
>> bf76f23aa1c1.
> 
> Both of these commits are merge commits and they seem to be not related to PCI
> or WiFi.
> 
>> It reproduces, but not 100%, on v6.17, and is likely 100%
>> reproducible on v6.18-rc.
>>
>> The dmesg output and the result of lspci -vv when the issue occurs can be
>> found below:
>>   https://gist.github.com/RadxaNaoki/bf57b6d3d88c1e4310a23247e7bac9de
>>
>> What should I investigate next?
>>
> 
> So the patch from Niklas [1] didn't solve the issue on these board + WiFi chip
> combo?

Yes, I am reproducing the issue with the patch applied, and it also 
reproduces on v6.17.

The RTL8852BE on the ROCK 5B+ is an onboard component, while the ROCK 5B 
uses an M.2 module; the issue does not appear on the ROCK 5A or ROCK 5 
ITX+ even with the same M.2 module and the same kernel/userland.

Best regards,

--
FUKAUMI Naoki
Radxa Computer (Shenzhen) Co., Ltd.

> - Mani
> 
> [1] https://lore.kernel.org/linux-pci/20251017163252.598812-2-cassel@kernel.org/
>