Re: [PATCH v6 09/16] PCI/AER: Update statistics early in logging

Sathyanarayanan Kuppuswamy
2025-05-20T01:32:42Z

On 5/19/25 2:35 PM, Bjorn Helgaas wrote:
> From: Bjorn Helgaas <bhelgaas@google.com>
>
> There are two AER logging entry points:
>
> - aer_print_error() is used by DPC (dpc_process_error()) and native AER
> handling (aer_process_err_devices()).
>
> - pci_print_aer() is used by GHES (aer_recover_work_func()) and CXL
> (cxl_handle_rdport_errors())
>
> Both use __aer_print_error() to print the AER error bits. Previously
> __aer_print_error() also incremented the AER statistics via
> pci_dev_aer_stats_incr().
>
> Call pci_dev_aer_stats_incr() early in the entry points instead of in
> __aer_print_error() so we update the statistics even if the actual printing
> of error bits is rate limited by a future change.
>
> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
> ---

Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>

> drivers/pci/pcie/aer.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
> index 73d618354f6a..eb80c382187d 100644
> --- a/drivers/pci/pcie/aer.c
> +++ b/drivers/pci/pcie/aer.c
> @@ -693,7 +693,6 @@ static void __aer_print_error(struct pci_dev *dev,
> aer_printk(level, dev, " [%2d] %-22s%s\n", i, errmsg,
> info->first_error == i ? " (First)" : "");
> }
> - pci_dev_aer_stats_incr(dev, info);
> }
>
> static void aer_print_source(struct pci_dev *dev, struct aer_err_info *info,
> @@ -714,6 +713,8 @@ void aer_print_error(struct pci_dev *dev, struct aer_err_info *info)
> int id = pci_dev_id(dev);
> const char *level;
>
> + pci_dev_aer_stats_incr(dev, info);
> +
> if (!info->status) {
> pci_err(dev, "PCIe Bus Error: severity=%s, type=Inaccessible, (Unregistered Agent ID)\n",
> aer_error_severity_string[info->severity]);
> @@ -782,6 +783,8 @@ void pci_print_aer(struct pci_dev *dev, int aer_severity,
> info.status = status;
> info.mask = mask;
>
> + pci_dev_aer_stats_incr(dev, &info);
> +
> layer = AER_GET_LAYER_ERROR(aer_severity, status);
> agent = AER_GET_AGENT(aer_severity, status);
>

--
Sathyanarayanan Kuppuswamy
Linux Kernel Developer