linux-kernel - Re: [PATCH v9 03/16] CXL/AER: Introduce kfifo for forwarding CXL errors

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Message-ID: <1f719cfd-2c2b-4431-a370-290a865b0bf2@amd.com>
Date: Wed, 4 Jun 2025 09:37:02 -0500
From: "Bowman, Terry" <terry.bowman@....com>
To: Dan Carpenter <dan.carpenter@...aro.org>
Cc: PradeepVineshReddy.Kodamati@....com, dave@...olabs.net,
 jonathan.cameron@...wei.com, dave.jiang@...el.com,
 alison.schofield@...el.com, vishal.l.verma@...el.com, ira.weiny@...el.com,
 dan.j.williams@...el.com, bhelgaas@...gle.com, bp@...en8.de,
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 Smita.KoralahalliChannabasappa@....com, kobayashi.da-06@...itsu.com,
 yanfei.xu@...el.com, rrichter@....com, peterz@...radead.org, colyli@...e.de,
 uaisheng.ye@...el.com, fabio.m.de.francesco@...ux.intel.com,
 ilpo.jarvinen@...ux.intel.com, yazen.ghannam@....com,
 linux-cxl@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-pci@...r.kernel.org
Subject: Re: [PATCH v9 03/16] CXL/AER: Introduce kfifo for forwarding CXL
 errors



On 6/4/2025 1:01 AM, Dan Carpenter wrote:
> On Tue, Jun 03, 2025 at 12:22:26PM -0500, Terry Bowman wrote:
>> +static struct work_struct cxl_prot_err_work;
>> +static DECLARE_WORK(cxl_prot_err_work, cxl_prot_err_work_fn);
>> +
>>  int cxl_ras_init(void)
>>  {
>> -	return cxl_cper_register_prot_err_work(&cxl_cper_prot_err_work);
>> +	int rc;
>> +
>> +	rc = cxl_cper_register_prot_err_work(&cxl_cper_prot_err_work);
>> +	if (rc)
>> +		pr_err("Failed to register CPER AER kfifo (%x)", rc);
> This shouldn't return rc;?

This was implemented to allow for native CXL handling initialization even if
FW-first (CPER) initialization fails. This can be changed to return rc.

Thanks for reviewing dan Carpenter.

-Terry

>
>> +
>> +	rc = cxl_register_prot_err_work(&cxl_prot_err_work);
>> +	if (rc) {
>> +		pr_err("Failed to register native AER kfifo (%x)", rc);
>> +		return rc;
>> +	}
>> +
>> +	return 0;
>>  }
> regards,
> dan carpenter
>