linux-kernel - Re: [PATCH v5 05/11] PCI: cadence: Extract link setup sequence from cdns_pcie_host

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Date: Tue, 16 Apr 2024 17:16:07 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Thomas Richard <thomas.richard@...tlin.com>
Cc: Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>,
	Tony Lindgren <tony@...mide.com>,
	Aaro Koskinen <aaro.koskinen@....fi>,
	Janusz Krzysztofik <jmkrzyszt@...il.com>,
	Vignesh R <vigneshr@...com>, Andi Shyti <andi.shyti@...nel.org>,
	Peter Rosin <peda@...ntia.se>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>,
	Siddharth Vadapalli <s-vadapalli@...com>,
	linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-omap@...r.kernel.org, linux-i2c@...r.kernel.org,
	linux-pci@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	gregory.clement@...tlin.com, theo.lebrun@...tlin.com,
	thomas.petazzoni@...tlin.com, u-kumar1@...com
Subject: Re: [PATCH v5 05/11] PCI: cadence: Extract link setup sequence from
 cdns_pcie_host_setup()

On Tue, Apr 16, 2024 at 03:29:54PM +0200, Thomas Richard wrote:
> diff --git a/drivers/pci/controller/cadence/pcie-cadence-host.c b/drivers/pci/controller/cadence/pcie-cadence-host.c
> index 5b14f7ee3c79..93d9922730af 100644
> --- a/drivers/pci/controller/cadence/pcie-cadence-host.c
> +++ b/drivers/pci/controller/cadence/pcie-cadence-host.c
> @@ -497,6 +497,30 @@ static int cdns_pcie_host_init(struct device *dev,
>  	return cdns_pcie_host_init_address_translation(rc);
>  }
>  
> +int cdns_pcie_host_link_setup(struct cdns_pcie_rc *rc)
> +{
> +	struct cdns_pcie *pcie = &rc->pcie;
> +	struct device *dev = rc->pcie.dev;
> +	int ret;
> +
> +	if (rc->quirk_detect_quiet_flag)
> +		cdns_pcie_detect_quiet_min_delay_set(&rc->pcie);
> +
> +	cdns_pcie_host_enable_ptm_response(pcie);
> +
> +	ret = cdns_pcie_start_link(pcie);
> +	if (ret) {
> +		dev_err(dev, "Failed to start link\n");
> +		return ret;
> +	}
> +
> +	ret = cdns_pcie_host_start_link(rc);
> +	if (ret)
> +		dev_dbg(dev, "PCIe link never came up\n");

If we're going to ignore this error the message should be a dev_err()
at least.


> +
> +	return 0;
> +}
> +

regards,
dan carpenter