linux-kernel - Re: [PATCH v6 12/16] PCI/AER: Make all pci_print

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Message-ID: <921fea13-9a28-9dc6-90c3-48498626f317@linux.intel.com>
Date: Tue, 20 May 2025 14:37:33 +0300 (EEST)
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To: Bjorn Helgaas <helgaas@...nel.org>
cc: linux-pci@...r.kernel.org, Jon Pan-Doh <pandoh@...gle.com>, 
    Karolina Stolarek <karolina.stolarek@...cle.com>, 
    Martin Petersen <martin.petersen@...cle.com>, 
    Ben Fuller <ben.fuller@...cle.com>, Drew Walton <drewwalton@...rosoft.com>, 
    Anil Agrawal <anilagrawal@...a.com>, Tony Luck <tony.luck@...el.com>, 
    Sathyanarayanan Kuppuswamy <sathyanarayanan.kuppuswamy@...ux.intel.com>, 
    Lukas Wunner <lukas@...ner.de>, 
    Jonathan Cameron <Jonathan.Cameron@...wei.com>, 
    Sargun Dhillon <sargun@...a.com>, "Paul E . McKenney" <paulmck@...nel.org>, 
    Mahesh J Salgaonkar <mahesh@...ux.ibm.com>, 
    Oliver O'Halloran <oohall@...il.com>, Kai-Heng Feng <kaihengf@...dia.com>, 
    Keith Busch <kbusch@...nel.org>, Robert Richter <rrichter@....com>, 
    Terry Bowman <terry.bowman@....com>, Shiju Jose <shiju.jose@...wei.com>, 
    Dave Jiang <dave.jiang@...el.com>, LKML <linux-kernel@...r.kernel.org>, 
    linuxppc-dev@...ts.ozlabs.org, Bjorn Helgaas <bhelgaas@...gle.com>
Subject: Re: [PATCH v6 12/16] PCI/AER: Make all pci_print_aer() log levels
 depend on error type

On Mon, 19 May 2025, Bjorn Helgaas wrote:

> From: Karolina Stolarek <karolina.stolarek@...cle.com>
> 
> Some existing logs in pci_print_aer() log with error severity by default.
> Convert them to depend on error type (consistent with rest of AER logging).
> 
> Link: https://lore.kernel.org/r/20250321015806.954866-3-pandoh@google.com
> Signed-off-by: Karolina Stolarek <karolina.stolarek@...cle.com>
> Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
> ---
>  drivers/pci/pcie/aer.c | 16 +++++++++++-----
>  1 file changed, 11 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
> index 73b03a195b14..06a7dda20846 100644
> --- a/drivers/pci/pcie/aer.c
> +++ b/drivers/pci/pcie/aer.c
> @@ -788,15 +788,21 @@ void pci_print_aer(struct pci_dev *dev, int aer_severity,
>  	layer = AER_GET_LAYER_ERROR(aer_severity, status);
>  	agent = AER_GET_AGENT(aer_severity, status);
>  
> -	pci_err(dev, "aer_status: 0x%08x, aer_mask: 0x%08x\n", status, mask);
> +	aer_printk(info.level, dev, "aer_status: 0x%08x, aer_mask: 0x%08x\n",
> +		   status, mask);
>  	__aer_print_error(dev, &info);
> -	pci_err(dev, "aer_layer=%s, aer_agent=%s\n",
> -		aer_error_layer[layer], aer_agent_string[agent]);
> +	aer_printk(info.level, dev, "aer_layer=%s, aer_agent=%s\n",
> +		   aer_error_layer[layer], aer_agent_string[agent]);
>  
>  	if (aer_severity != AER_CORRECTABLE)
> -		pci_err(dev, "aer_uncor_severity: 0x%08x\n",
> -			aer->uncor_severity);
> +		aer_printk(info.level, dev, "aer_uncor_severity: 0x%08x\n",
> +			   aer->uncor_severity);
>  
> +	/*
> +	 * pcie_print_tlp_log() uses KERN_ERR, but we only call it when
> +	 * tlp_header_valid is set, and info.level is always KERN_ERR in
> +	 * that case.
> +	 */
>  	if (tlp_header_valid)
>  		pcie_print_tlp_log(dev, &aer->header_log, dev_fmt("  "));

There's another similar callsite but only this has the comment added. I 
was thinking if this call could be made from __aer_print_error(). There 
would be small change in order of messages but I can't seem to decide if 
it would be bad/good.

Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>


>  }
> 

-- 
 i.