netdev - Re: [PATCH v1] farsync: use generic power management

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Date:   Tue, 28 Jul 2020 15:04:13 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Vaibhav Gupta <vaibhavgupta40@...il.com>
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Bjorn Helgaas <bjorn@...gaas.com>,
        Vaibhav Gupta <vaibhav.varodek@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Kevin Curtis <kevin.curtis@...site.co.uk>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH v1] farsync: use generic power management

On Tue, Jul 28, 2020 at 09:58:10AM +0530, Vaibhav Gupta wrote:
> The .suspend() and .resume() callbacks are not defined for this driver.
> Still, their power management structure follows the legacy framework. To
> bring it under the generic framework, simply remove the binding of
> callbacks from "struct pci_driver".

FWIW, this commit log is slightly misleading because .suspend and
.resume are NULL by default, so this patch actually is a complete
no-op as far as code generation is concerned.

This change is worthwhile because it simplifies the code a little, but
it doesn't convert the driver from legacy to generic power management.
This driver doesn't supply a .pm structure, so it doesn't seem to do
*any* power management.

> Change code indentation from space to tab in "struct pci_driver".
> 
> Signed-off-by: Vaibhav Gupta <vaibhavgupta40@...il.com>
> ---
>  drivers/net/wan/farsync.c | 10 ++++------
>  1 file changed, 4 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/net/wan/farsync.c b/drivers/net/wan/farsync.c
> index 7916efce7188..15dacfde6b83 100644
> --- a/drivers/net/wan/farsync.c
> +++ b/drivers/net/wan/farsync.c
> @@ -2636,12 +2636,10 @@ fst_remove_one(struct pci_dev *pdev)
>  }
>  
>  static struct pci_driver fst_driver = {
> -        .name		= FST_NAME,
> -        .id_table	= fst_pci_dev_id,
> -        .probe		= fst_add_one,
> -        .remove	= fst_remove_one,
> -        .suspend	= NULL,
> -        .resume	= NULL,
> +	.name		= FST_NAME,
> +	.id_table	= fst_pci_dev_id,
> +	.probe		= fst_add_one,
> +	.remove		= fst_remove_one,
>  };
>  
>  static int __init
> -- 
> 2.27.0
>