linux-kernel - Re: [PATCH v10 8/8] PCI: Change the type of probe argument in reset functions

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Date:   Tue, 27 Jul 2021 17:22:55 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Amey Narkhede <ameynarkhede03@...il.com>
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>, alex.williamson@...hat.com,
        Raphael Norwitz <raphael.norwitz@...anix.com>,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        kw@...ux.com, Shanker Donthineni <sdonthineni@...dia.com>,
        Sinan Kaya <okaya@...nel.org>, Len Brown <lenb@...nel.org>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>
Subject: Re: [PATCH v10 8/8] PCI: Change the type of probe argument in reset
 functions

On Fri, Jul 09, 2021 at 06:08:13PM +0530, Amey Narkhede wrote:
> Introduce a new enum pci_reset_mode_t to make the context of probe argument
> in reset functions clear and the code easier to read.  Change the type of
> probe argument in functions which implement reset methods from int to
> pci_reset_mode_t to make the intent clear.

Not sure adding an enum and a PCI_RESET_MODE_MAX seems worth it to me.
It's really a boolean parameter, and I'd be happy to change it to a
bool.  But I don't think it's worth checking against
PCI_RESET_MODE_MAX unless we need more than two options.

> Add a new line in return statement of pci_reset_bus_function().

Drop this line, since I don't think it's correct and there's no need
to describe whitespace changes anyway.

> Suggested-by: Alex Williamson <alex.williamson@...hat.com>
> Suggested-by: Krzysztof Wilczyński <kw@...ux.com>
> Signed-off-by: Amey Narkhede <ameynarkhede03@...il.com>

> @@ -306,7 +306,7 @@ static int nitrox_device_flr(struct pci_dev *pdev)
>  		return -ENOMEM;
>  	}
>  
> -	pcie_reset_flr(pdev, 0);
> +	pcie_reset_flr(pdev, PCI_RESET_DO_RESET);
>  
>  	pci_restore_state(pdev);
>  

> @@ -526,7 +526,7 @@ static void octeon_destroy_resources(struct octeon_device *oct)
>  			oct->irq_name_storage = NULL;
>  		}
>  		/* Soft reset the octeon device before exiting */
> -		if (!pcie_reset_flr(oct->pci_dev, 1))
> +		if (!pcie_reset_flr(oct->pci_dev, PCI_RESET_PROBE))
>  			octeon_pci_flr(oct);
>  		else
>  			cn23xx_vf_ask_pf_to_do_flr(oct);

> +typedef enum pci_reset_mode {
> +	PCI_RESET_DO_RESET,
> +	PCI_RESET_PROBE,
> +	PCI_RESET_MODE_MAX,
> +} pci_reset_mode_t;