Re: [PATCH 1/8] PCI/AER: Remove aer_print_port_info

[Sathyanarayanan Kuppuswamy <sathyanarayanan.kuppuswamy@linux.intel.com>]

On 1/14/25 11:42 PM, Jon Pan-Doh wrote:
> Info logged is duplicated when either the source device is processed. If
> no source device is found, than an error is logged.

Any issue with logging when no source device is found in device
hierarchy?

>
> Code flow:
> aer_isr_one_error()
> -> aer_print_port_info()
> -> find_source_device()
>     -> return/pci_info() if no device found else continue
> -> aer_process_err_devices()
>     -> aer_print_error()
>
> aer_print_port_info():
> [   21.596150] pcieport 0000:00:04.0: Correctable error message received
> from 0000:01:00.0
>
> aer_print_error():
> [   21.596163] e1000e 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Data Link Layer, (Receiver ID)
> [   21.600575] e1000e 0000:01:00.0:   device [8086:10d3] error status/mask=00000040/0000e000
> [   21.604707] e1000e 0000:01:00.0:    [ 6] BadTLP

Please remove time stamp from dmesg log.

>
> Tested using aer-inject[1] tool. No more root port log on dmesg.
>
> [1] https://git.kernel.org/pub/scm/linux/kernel/git/gong.chen/aer-inject.git
>
> Signed-off-by: Jon Pan-Doh <pandoh@google.com>
> ---
>   drivers/pci/pcie/aer.c | 15 ---------------
>   1 file changed, 15 deletions(-)
>
> diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
> index 34ce9f834d0c..ba40800b5494 100644
> --- a/drivers/pci/pcie/aer.c
> +++ b/drivers/pci/pcie/aer.c
> @@ -735,18 +735,6 @@ void aer_print_error(struct pci_dev *dev, struct aer_err_info *info)
>   			info->severity, info->tlp_header_valid, &info->tlp);
>   }
>   
> -static void aer_print_port_info(struct pci_dev *dev, struct aer_err_info *info)
> -{
> -	u8 bus = info->id >> 8;
> -	u8 devfn = info->id & 0xff;
> -
> -	pci_info(dev, "%s%s error message received from %04x:%02x:%02x.%d\n",
> -		 info->multi_error_valid ? "Multiple " : "",
> -		 aer_error_severity_string[info->severity],
> -		 pci_domain_nr(dev->bus), bus, PCI_SLOT(devfn),
> -		 PCI_FUNC(devfn));
> -}
> -
>   #ifdef CONFIG_ACPI_APEI_PCIEAER
>   int cper_severity_to_aer(int cper_severity)
>   {
> @@ -1295,7 +1283,6 @@ static void aer_isr_one_error(struct aer_rpc *rpc,
>   			e_info.multi_error_valid = 1;
>   		else
>   			e_info.multi_error_valid = 0;
> -		aer_print_port_info(pdev, &e_info);
>   
>   		if (find_source_device(pdev, &e_info))
>   			aer_process_err_devices(&e_info);
> @@ -1314,8 +1301,6 @@ static void aer_isr_one_error(struct aer_rpc *rpc,
>   		else
>   			e_info.multi_error_valid = 0;
>   
> -		aer_print_port_info(pdev, &e_info);
> -
>   		if (find_source_device(pdev, &e_info))
>   			aer_process_err_devices(&e_info);
>   	}

-- 
Sathyanarayanan Kuppuswamy
Linux Kernel Developer