Re: [PATCH 1/2] PCI/pwrctrl: Ensure that the remote endpoint node parent has the supply requirement

[Bartosz Golaszewski]

On Tue, 17 Feb 2026 11:18:46 +0100, Manivannan Sadhasivam via B4 Relay
<devnull+manivannan.sadhasivam.oss.qualcomm.com@xxxxxxxxxx> said:
> From: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxxxxxxxx>
>
> If OF graph is used in the PCI device node, pwrctrl core currently creates
> the pwrctrl device even if the remote endpoint doesn't have the power
> supply requirements. Since the device doesn't have any power supply
> requirements, there was no pwrctrl driver to probe, leading to PCI
> controller driver probe deferral as it waits for all pwrctrl drivers to
> probe before starting bus scan.
>
> This issue happens with Qcom ath12k devices with WSI interface attached to
> the Qcom IPQ platforms.
>
> Fix this issue by checking for the existence of at least one power supply
> property in the remote endpoint parent node. To consolidate all the checks,
> create a new helper pci_pwrctrl_is_required() and move all the checks
> there.
>
> Fixes: 9db826206f9b ("PCI/pwrctrl: Create pwrctrl device if graph port is found")
> Reported-by: Raj Kumar Bhagat <raj.bhagat@xxxxxxxxxxxxxxxx>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxxxxxxxx>
> ---

Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxxxxxxxx>