netdev - Re: [PATCH] igc: Mask replay rollover/timeout errors in I225

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Date:   Sun, 1 Jan 2023 10:32:17 +0200
From:   Leon Romanovsky <leon@...nel.org>
To:     Rajat Khandelwal <rajat.khandelwal@...ux.intel.com>
Cc:     jesse.brandeburg@...el.com, anthony.l.nguyen@...el.com,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, intel-wired-lan@...ts.osuosl.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        rajat.khandelwal@...el.com
Subject: Re: [PATCH] igc: Mask replay rollover/timeout errors in I225_LMVP

On Thu, Dec 29, 2022 at 05:56:40PM +0530, Rajat Khandelwal wrote:
> The CPU logs get flooded with replay rollover/timeout AER errors in
> the system with i225_lmvp connected, usually inside thunderbolt devices.
> 
> One of the prominent TBT4 docks we use is HP G4 Hook2, which incorporates
> an Intel Foxville chipset, which uses the igc driver.
> On connecting ethernet, CPU logs get inundated with these errors. The point
> is we shouldn't be spamming the logs with such correctible errors as it
> confuses other kernel developers less familiar with PCI errors, support
> staff, and users who happen to look at the logs.
> 
> Signed-off-by: Rajat Khandelwal <rajat.khandelwal@...ux.intel.com>
> ---
>  drivers/net/ethernet/intel/igc/igc_main.c | 28 +++++++++++++++++++++--
>  1 file changed, 26 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
> index ebff0e04045d..a3a6e8086c8d 100644
> --- a/drivers/net/ethernet/intel/igc/igc_main.c
> +++ b/drivers/net/ethernet/intel/igc/igc_main.c
> @@ -6201,6 +6201,26 @@ u32 igc_rd32(struct igc_hw *hw, u32 reg)
>  	return value;
>  }
>  
> +#ifdef CONFIG_PCIEAER
> +static void igc_mask_aer_replay_correctible(struct igc_adapter *adapter)
> +{
> +	struct pci_dev *pdev = adapter->pdev;
> +	u32 aer_pos, corr_mask;
> +
> +	if (pdev->device != IGC_DEV_ID_I225_LMVP)
> +		return;
> +
> +	aer_pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
> +	if (!aer_pos)
> +		return;
> +
> +	pci_read_config_dword(pdev, aer_pos + PCI_ERR_COR_MASK, &corr_mask);
> +
> +	corr_mask |= PCI_ERR_COR_REP_ROLL | PCI_ERR_COR_REP_TIMER;
> +	pci_write_config_dword(pdev, aer_pos + PCI_ERR_COR_MASK, corr_mask);

Shouldn't this igc_mask_aer_replay_correctible function be implemented
in drivers/pci/quirks.c and not in igc_probe()?

Thanks