Re: [PATCH] soc: qcom: pmic_glink: Avoid losing early rpmsg probe

[Val Packett]

On 7/20/26 11:39 AM, Konrad Dybcio wrote:
> From: Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxxxx>
>
> The PMIC GLINK rpmsg device can appear before the platform device has
> finished probing. In that case pmic_glink_rpmsg_probe() sees
> __pmic_glink as NULL and returns -ENODEV, which is treated as a fatal
> probe failure for the rpmsg endpoint.
>
> If this race is hit, pg->ept is never installed and PMIC GLINK clients
> never receive the service-up notification. This may leave the system
> with no Type-C functionality and without battery/power supply
> management.
>
> Return -EPROBE_DEFER when the rpmsg endpoint arrives before the platform
> device is ready. [..]

Hm, in the Linaro tree there was this hack patch to accomplish the same 
thing differently:

https://gitlab.com/Linaro/arm64-laptops/linux/-/commit/8c309c7e852a49118ddc2ee54c3d8b7c74466f6a

that claimed that "Returning -EPROBE_DEFER from the rpmsg driver does 
not seem to work because the rpmsg core doesn't handle EPROBE_DEFER(?)"

Was that resolved or was that always wrong?


Thanks,
~val