[PATCH] PCI/AER: correctable error message as KERN_INFO

[Bjorn Helgaas]

On Wed, Mar 08, 2023 at 12:00:48PM -0800, Grant Grundler wrote:
> Ping? Did I miss an email or other work that this patch collides with?

Nope, we typically make topic branches based on -rc1, so not much
happens during the merge window.  -rc1 was tagged Sunday, so things
will start appearing in -next soon.

Bjorn

> On Tue, Feb 28, 2023 at 10:05 PM Grant Grundler <grundler at chromium.org> wrote:
> >
> > Since correctable errors have been corrected (and counted), the dmesg output
> > should not be reported as a warning, but rather as "informational".
> >
> > Otherwise, using a certain well known vendor's PCIe parts in a USB4 docking
> > station, the dmesg buffer can be spammed with correctable errors, 717 bytes
> > per instance, potentially many MB per day.
> >
> > Given the "WARN" priority, these messages have already confused the typical
> > user that stumbles across them, support staff (triaging feedback reports),
> > and more than a few linux kernel devs. Changing to INFO will hide these
> > messages from most audiences.
> >
> > Signed-off-by: Grant Grundler <grundler at chromium.org>
> > ---
> > This patch will likely conflict with:
> >   https://lore.kernel.org/all/20230103165548.570377-1-rajat.khandelwal@linux.intel.com/
> >
> > which I'd also like to see upstream. Please let me know to resubmit mine if Rajat's patch lands first. Or feel free to fix up this one.
> >
> >  drivers/pci/pcie/aer.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
> > index f6c24ded134c..e4cf3ec40d66 100644
> > --- a/drivers/pci/pcie/aer.c
> > +++ b/drivers/pci/pcie/aer.c
> > @@ -692,7 +692,7 @@ static void __aer_print_error(struct pci_dev *dev,
> >
> >         if (info->severity == AER_CORRECTABLE) {
> >                 strings = aer_correctable_error_string;
> > -               level = KERN_WARNING;
> > +               level = KERN_INFO;
> >         } else {
> >                 strings = aer_uncorrectable_error_string;
> >                 level = KERN_ERR;
> > @@ -724,7 +724,7 @@ void aer_print_error(struct pci_dev *dev, struct aer_err_info *info)
> >         layer = AER_GET_LAYER_ERROR(info->severity, info->status);
> >         agent = AER_GET_AGENT(info->severity, info->status);
> >
> > -       level = (info->severity == AER_CORRECTABLE) ? KERN_WARNING : KERN_ERR;
> > +       level = (info->severity == AER_CORRECTABLE) ? KERN_INFO : KERN_ERR;
> >
> >         pci_printk(level, dev, "PCIe Bus Error: severity=%s, type=%s, (%s)\n",
> >                    aer_error_severity_string[info->severity],
> > --
> > 2.39.2.722.g9855ee24e9-goog
> >