linux-kernel - Re: [PATCH V2 9/9] PCI/AER: Add RCEC AER error injection support

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Date:   Wed, 05 Aug 2020 11:09:04 -0700
From:   "Sean V Kelley" <sean.v.kelley@...el.com>
To:     "Jonathan Cameron" <Jonathan.Cameron@...wei.com>
Cc:     bhelgaas@...gle.com, rjw@...ysocki.net, ashok.raj@...el.com,
        tony.luck@...el.com, sathyanarayanan.kuppuswamy@...ux.intel.com,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        "Qiuxu Zhuo" <qiuxu.zhuo@...el.com>
Subject: Re: [PATCH V2 9/9] PCI/AER: Add RCEC AER error injection support

On 5 Aug 2020, at 10:54, Jonathan Cameron wrote:

> On Tue, 4 Aug 2020 12:40:52 -0700
> Sean V Kelley <sean.v.kelley@...el.com> wrote:
>
>> From: Qiuxu Zhuo <qiuxu.zhuo@...el.com>
>>
>> The Root Complex Event Collectors(RCEC) appear as peers to Root Ports
>> and also have the AER capability. So add RCEC support to the current AER
>> error injection driver.
>>
>> Co-developed-by: Sean V Kelley <sean.v.kelley@...el.com>
>> Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@...el.com>
>> Signed-off-by: Sean V Kelley <sean.v.kelley@...el.com>
>
> Silly English subtlety inline.
>
>> ---
>>  drivers/pci/pcie/aer_inject.c | 5 ++++-
>>  1 file changed, 4 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/pci/pcie/aer_inject.c b/drivers/pci/pcie/aer_inject.c
>> index c2cbf425afc5..2077dc826fdf 100644
>> --- a/drivers/pci/pcie/aer_inject.c
>> +++ b/drivers/pci/pcie/aer_inject.c
>> @@ -333,8 +333,11 @@ static int aer_inject(struct aer_error_inj *einj)
>>  	if (!dev)
>>  		return -ENODEV;
>>  	rpdev = pcie_find_root_port(dev);
>> +	/* If Root port not found, try to find an RCEC */
>> +	if (!rpdev)
>> +		rpdev = dev->rcec;
>>  	if (!rpdev) {
>> -		pci_err(dev, "Root port not found\n");
>> +		pci_err(dev, "Root port or RCEC not found\n");
>
> That is a bit confusing, could be
>
> RP | !RCEC
>
> "Neither root port nor RCEC found\n" perhaps?

Sounds good to me. Will correct.

Thanks,

Sean

>
>
>>  		ret = -ENODEV;
>>  		goto out_put;
>>  	}