5.14 rc6 broken for QCA6390 on Dell XPS 13 9310

[Nicolas Schichan]

On 23/08/2021 14:53, Kalle Valo wrote:
> (adding linux-wireless, regressions and some mhi folks)
> 
> Wren Turkal <wt at penguintechs.org> writes:
> 
>> I have no device for the wifi on my computer. 5.13 worked pretty well.
>> I also found others reporting similar issues:
>> https://forum.manjaro.org/t/kernel5-14-rc6-ath11k-on-qca6390-regression-mhi-probe-failure/79362
>>
>> Here's info about the hardware on my laptop:
>> ➜  ~ sudo dmidecode -s system-product-name
>> XPS 13 9310
>>
>> ➜  ~ sudo dmidecode -s bios-version
>> 3.0.4
> 
> Do you get the same mhi error as in the forum post?
> 
> qcom_mhi_qrtr: probe of mhi0_IPCR failed with error -22
> 
> MHI folks, any ideas? I have XPS 13 9310 myself but I'm not able to test
> v5.14-rc6 kernel right now.

Hello,

I have hit the same issue on Linux 5.14-rc7:

[   14.780566] qcom_mhi_qrtr: probe of mhi0_IPCR failed with error -22

This looks to be caused by commit:

ce78ffa3ef16 net: really fix the build...

Reverting this commit results in ath11k being able to load without errors.

Regards,

-- 
Nicolas Schichan