linux-kernel - Re: [PATCH v12 08/13] PCI: dwc: ep: Call epc_create() early in dw_pcie_ep

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Message-ID: <Z9YoPgphIhYDmOga@lizhi-Precision-Tower-5810>
Date: Sat, 15 Mar 2025 21:24:14 -0400
From: Frank Li <Frank.li@....com>
To: Bjorn Helgaas <helgaas@...nel.org>
Cc: Rob Herring <robh@...nel.org>, Saravana Kannan <saravanak@...gle.com>,
	Jingoo Han <jingoohan1@...il.com>,
	Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Richard Zhu <hongxing.zhu@....com>,
	Lucas Stach <l.stach@...gutronix.de>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	Niklas Cassel <cassel@...nel.org>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-pci@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	imx@...ts.linux.dev, Bjorn Helgaas <bhelgaas@...gle.com>
Subject: Re: [PATCH v12 08/13] PCI: dwc: ep: Call epc_create() early in
 dw_pcie_ep_init()

On Sat, Mar 15, 2025 at 03:15:43PM -0500, Bjorn Helgaas wrote:
> From: Bjorn Helgaas <bhelgaas@...gle.com>
>
> Move devm_pci_epc_create() to the beginning of dw_pcie_ep_init().
>
> devm_pci_epc_create() is generic code that doesn't depend on any DWC
> resource, so moving it earlier keeps all the subsequent devicetree-related
> code together.
>
> Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>

Reviewed-by: Frank Li <Frank.Li@....com>

> ---
>  .../pci/controller/dwc/pcie-designware-ep.c    | 18 +++++++++---------
>  1 file changed, 9 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c
> index 80ac2f9e88eb..100d26466f05 100644
> --- a/drivers/pci/controller/dwc/pcie-designware-ep.c
> +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
> @@ -904,6 +904,15 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
>
>  	INIT_LIST_HEAD(&ep->func_list);
>
> +	epc = devm_pci_epc_create(dev, &epc_ops);
> +	if (IS_ERR(epc)) {
> +		dev_err(dev, "Failed to create epc device\n");
> +		return PTR_ERR(epc);
> +	}
> +
> +	ep->epc = epc;
> +	epc_set_drvdata(epc, ep);
> +
>  	ret = dw_pcie_get_resources(pci);
>  	if (ret)
>  		return ret;
> @@ -918,15 +927,6 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
>  	if (ep->ops->pre_init)
>  		ep->ops->pre_init(ep);
>
> -	epc = devm_pci_epc_create(dev, &epc_ops);
> -	if (IS_ERR(epc)) {
> -		dev_err(dev, "Failed to create epc device\n");
> -		return PTR_ERR(epc);
> -	}
> -
> -	ep->epc = epc;
> -	epc_set_drvdata(epc, ep);
> -
>  	ret = of_property_read_u8(np, "max-functions", &epc->max_functions);
>  	if (ret < 0)
>  		epc->max_functions = 1;
> --
> 2.34.1
>