Re: [PATCH v6 12/16] PCI/AER: Make all pci_print_aer() log levels depend on error type

[Bjorn Helgaas <helgaas@kernel.org>]

On Tue, May 20, 2025 at 02:37:33PM +0300, Ilpo Järvinen wrote:
> On Mon, 19 May 2025, Bjorn Helgaas wrote:
> 
> > From: Karolina Stolarek <karolina.stolarek@oracle.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@oracle.com>
> > Signed-off-by: Bjorn Helgaas <bhelgaas@google.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.

I guess the other caller is dpc_process_rp_pio_error(), which uses
pci_err() for other logging, so at least it matches the level used by
pcie_print_tlp_log().

This patch uses info.level to control the message level, and
pcie_print_tlp_log() doesn't look at info.level.  I added this comment
to explain why that's OK and the message level happens to match
already.  Maybe not super ideal long term.