Re: [PATCH v8 13/20] PCI/ERR: Add printk level to pcie_print_tlp_log()

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

On 5/22/25 4:21 PM, Bjorn Helgaas wrote:
> From: Bjorn Helgaas <bhelgaas@google.com>
>
> aer_print_error() produces output at a printk level (KERN_ERR/KERN_WARNING/
> etc) that depends on the kind of error, and it calls pcie_print_tlp_log(),
> which previously always produced output at KERN_ERR.
>
> Add a "level" parameter so aer_print_error() can control the level of the
> pcie_print_tlp_log() output to match.
>
> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
> ---

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

>   drivers/pci/pci.h      | 3 ++-
>   drivers/pci/pcie/aer.c | 5 +++--
>   drivers/pci/pcie/dpc.c | 2 +-
>   drivers/pci/pcie/tlp.c | 6 ++++--
>   4 files changed, 10 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
> index 705f9ef58acc..1a9bfc708757 100644
> --- a/drivers/pci/pci.h
> +++ b/drivers/pci/pci.h
> @@ -613,7 +613,8 @@ int pcie_read_tlp_log(struct pci_dev *dev, int where, int where2,
>   		      struct pcie_tlp_log *log);
>   unsigned int aer_tlp_log_len(struct pci_dev *dev, u32 aercc);
>   void pcie_print_tlp_log(const struct pci_dev *dev,
> -			const struct pcie_tlp_log *log, const char *pfx);
> +			const struct pcie_tlp_log *log, const char *level,
> +			const char *pfx);
>   #endif	/* CONFIG_PCIEAER */
>   
>   #ifdef CONFIG_PCIEPORTBUS
> diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
> index f80c78846a14..f0936759ba8b 100644
> --- a/drivers/pci/pcie/aer.c
> +++ b/drivers/pci/pcie/aer.c
> @@ -734,7 +734,7 @@ void aer_print_error(struct pci_dev *dev, struct aer_err_info *info)
>   	__aer_print_error(dev, info);
>   
>   	if (info->tlp_header_valid)
> -		pcie_print_tlp_log(dev, &info->tlp, dev_fmt("  "));
> +		pcie_print_tlp_log(dev, &info->tlp, level, dev_fmt("  "));
>   
>   out:
>   	if (info->id && info->error_dev_num > 1 && info->id == id)
> @@ -797,7 +797,8 @@ void pci_print_aer(struct pci_dev *dev, int aer_severity,
>   			aer->uncor_severity);
>   
>   	if (tlp_header_valid)
> -		pcie_print_tlp_log(dev, &aer->header_log, dev_fmt("  "));
> +		pcie_print_tlp_log(dev, &aer->header_log, info.level,
> +				   dev_fmt("  "));
>   }
>   EXPORT_SYMBOL_NS_GPL(pci_print_aer, "CXL");
>   
> diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c
> index 6c98fabdba57..7ae1590ea1da 100644
> --- a/drivers/pci/pcie/dpc.c
> +++ b/drivers/pci/pcie/dpc.c
> @@ -222,7 +222,7 @@ static void dpc_process_rp_pio_error(struct pci_dev *pdev)
>   			  dpc_tlp_log_len(pdev),
>   			  pdev->subordinate->flit_mode,
>   			  &tlp_log);
> -	pcie_print_tlp_log(pdev, &tlp_log, dev_fmt(""));
> +	pcie_print_tlp_log(pdev, &tlp_log, KERN_ERR, dev_fmt(""));
>   
>   	if (pdev->dpc_rp_log_size < PCIE_STD_NUM_TLP_HEADERLOG + 1)
>   		goto clear_status;
> diff --git a/drivers/pci/pcie/tlp.c b/drivers/pci/pcie/tlp.c
> index 890d5391d7f5..71f8fc9ea2ed 100644
> --- a/drivers/pci/pcie/tlp.c
> +++ b/drivers/pci/pcie/tlp.c
> @@ -98,12 +98,14 @@ int pcie_read_tlp_log(struct pci_dev *dev, int where, int where2,
>    * pcie_print_tlp_log - Print TLP Header / Prefix Log contents
>    * @dev: PCIe device
>    * @log: TLP Log structure
> + * @level: Printk log level
>    * @pfx: String prefix
>    *
>    * Prints TLP Header and Prefix Log information held by @log.
>    */
>   void pcie_print_tlp_log(const struct pci_dev *dev,
> -			const struct pcie_tlp_log *log, const char *pfx)
> +			const struct pcie_tlp_log *log, const char *level,
> +			const char *pfx)
>   {
>   	/* EE_PREFIX_STR fits the extended DW space needed for the Flit mode */
>   	char buf[11 * PCIE_STD_MAX_TLP_HEADERLOG + 1];
> @@ -130,6 +132,6 @@ void pcie_print_tlp_log(const struct pci_dev *dev,
>   		}
>   	}
>   
> -	pci_err(dev, "%sTLP Header%s: %s\n", pfx,
> +	dev_printk(level, &dev->dev, "%sTLP Header%s: %s\n", pfx,
>   		log->flit ? " (Flit)" : "", buf);
>   }

-- 
Sathyanarayanan Kuppuswamy
Linux Kernel Developer