linux-kernel - Re: [PATCH v2 3/9] NTB: Change to use pci_aer_clear_uncorrect_error

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Date:   Tue, 27 Sep 2022 12:39:10 -0700
From:   Sathyanarayanan Kuppuswamy 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>
To:     Zhuo Chen <chenzhuo.1@...edance.com>, bhelgaas@...gle.com,
        ruscur@...sell.cc, oohall@...il.com, fancer.lancer@...il.com,
        jdmason@...zu.us, dave.jiang@...el.com, allenbh@...il.com,
        james.smart@...adcom.com, dick.kennedy@...adcom.com,
        jejb@...ux.ibm.com, martin.petersen@...cle.com
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org, ntb@...ts.linux.dev,
        linux-scsi@...r.kernel.org
Subject: Re: [PATCH v2 3/9] NTB: Change to use
 pci_aer_clear_uncorrect_error_status()



On 9/27/22 8:35 AM, Zhuo Chen wrote:
> Status bits for ERR_NONFATAL errors only are cleared in
> pci_aer_clear_nonfatal_status(), but we want clear uncorrectable
> error status in idt_init_pci(), so we change to use
> pci_aer_clear_uncorrect_error_status().

You mean currently driver does not clear fatal errors now, and it is
a problem? Any error reported?

Also, I am wondering why is it required to clear errors during init
code. Is it a norm?

> 
> Signed-off-by: Zhuo Chen <chenzhuo.1@...edance.com>
> ---
>  drivers/ntb/hw/idt/ntb_hw_idt.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/ntb/hw/idt/ntb_hw_idt.c b/drivers/ntb/hw/idt/ntb_hw_idt.c
> index 0ed6f809ff2e..d5f0aa87f817 100644
> --- a/drivers/ntb/hw/idt/ntb_hw_idt.c
> +++ b/drivers/ntb/hw/idt/ntb_hw_idt.c
> @@ -2657,8 +2657,8 @@ static int idt_init_pci(struct idt_ntb_dev *ndev)
>  	ret = pci_enable_pcie_error_reporting(pdev);
>  	if (ret != 0)
>  		dev_warn(&pdev->dev, "PCIe AER capability disabled\n");
> -	else /* Cleanup nonfatal error status before getting to init */
> -		pci_aer_clear_nonfatal_status(pdev);
> +	else /* Cleanup uncorrectable error status before getting to init */
> +		pci_aer_clear_uncorrect_error_status(pdev);
>  
>  	/* First enable the PCI device */
>  	ret = pcim_enable_device(pdev);

-- 
Sathyanarayanan Kuppuswamy
Linux Kernel Developer