linux-kernel - Re: [PATCH v8 17/20] PCI/AER: Simplify add_error

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Message-ID: <2c79c6b5-db40-4e54-b058-a95c56f735fb@linux.intel.com>
Date: Thu, 22 May 2025 16:57:22 -0700
From: Sathyanarayanan Kuppuswamy <sathyanarayanan.kuppuswamy@...ux.intel.com>
To: Bjorn Helgaas <helgaas@...nel.org>, linux-pci@...r.kernel.org
Cc: Jon Pan-Doh <pandoh@...gle.com>,
 Karolina Stolarek <karolina.stolarek@...cle.com>,
 Weinan Liu <wnliu@...gle.com>, Martin Petersen <martin.petersen@...cle.com>,
 Ben Fuller <ben.fuller@...cle.com>, Drew Walton <drewwalton@...rosoft.com>,
 Anil Agrawal <anilagrawal@...a.com>, Tony Luck <tony.luck@...el.com>,
 Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
 Lukas Wunner <lukas@...ner.de>,
 Jonathan Cameron <Jonathan.Cameron@...wei.com>,
 Sargun Dhillon <sargun@...a.com>, "Paul E . McKenney" <paulmck@...nel.org>,
 Mahesh J Salgaonkar <mahesh@...ux.ibm.com>,
 Oliver O'Halloran <oohall@...il.com>, Kai-Heng Feng <kaihengf@...dia.com>,
 Keith Busch <kbusch@...nel.org>, Robert Richter <rrichter@....com>,
 Terry Bowman <terry.bowman@....com>, Shiju Jose <shiju.jose@...wei.com>,
 Dave Jiang <dave.jiang@...el.com>, linux-kernel@...r.kernel.org,
 linuxppc-dev@...ts.ozlabs.org, Bjorn Helgaas <bhelgaas@...gle.com>
Subject: Re: [PATCH v8 17/20] PCI/AER: Simplify add_error_device()

On 5/22/25 4:21 PM, Bjorn Helgaas wrote:
> From: Bjorn Helgaas <bhelgaas@...gle.com>
>
> Return -ENOSPC error early so the usual path through add_error_device() is
> the straightline code.
>
> Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
> ---

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

>   drivers/pci/pcie/aer.c | 15 +++++++++------
>   1 file changed, 9 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
> index 237741e66d28..24f0f5c55256 100644
> --- a/drivers/pci/pcie/aer.c
> +++ b/drivers/pci/pcie/aer.c
> @@ -816,12 +816,15 @@ EXPORT_SYMBOL_NS_GPL(pci_print_aer, "CXL");
>    */
>   static int add_error_device(struct aer_err_info *e_info, struct pci_dev *dev)
>   {
> -	if (e_info->error_dev_num < AER_MAX_MULTI_ERR_DEVICES) {
> -		e_info->dev[e_info->error_dev_num] = pci_dev_get(dev);
> -		e_info->error_dev_num++;
> -		return 0;
> -	}
> -	return -ENOSPC;
> +	int i = e_info->error_dev_num;
> +
> +	if (i >= AER_MAX_MULTI_ERR_DEVICES)
> +		return -ENOSPC;
> +
> +	e_info->dev[i] = pci_dev_get(dev);
> +	e_info->error_dev_num++;
> +
> +	return 0;
>   }
>   
>   /**

-- 
Sathyanarayanan Kuppuswamy
Linux Kernel Developer