Re: [PATCH v5 05/11] PCI: cadence: Extract link setup sequence from cdns_pcie_host_setup()

[Thomas Richard <thomas.richard@bootlin.com>]

On 4/16/24 16:16, Dan Carpenter wrote:
> 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.

Hello Dan,

In fact we already ignore this error [1]
I only moved the hardware configuration part of cdns_pcie_host_setup()
into a new function cdns_pcie_host_link_setup().

But I can use this patch to switch to dev_err() if needed.

[1]
https://elixir.bootlin.com/linux/v6.9-rc4/source/drivers/pci/controller/cadence/pcie-cadence-host.c#L549

Regards,

Thomas