linux-kernel - Re: [RFC net-next PATCH 08/16] net: macb: Clean up macb

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Message-ID: <YVuIcqKjDgawNPG4@shell.armlinux.org.uk>
Date:   Tue, 5 Oct 2021 00:04:18 +0100
From:   "Russell King (Oracle)" <linux@...linux.org.uk>
To:     Sean Anderson <sean.anderson@...o.com>
Cc:     netdev@...r.kernel.org, "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, linux-kernel@...r.kernel.org,
        Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>
Subject: Re: [RFC net-next PATCH 08/16] net: macb: Clean up macb_validate

On Mon, Oct 04, 2021 at 03:15:19PM -0400, Sean Anderson wrote:
> As the number of interfaces grows, the number of if statements grows
> ever more unweildy. Clean everything up a bit by using a switch
> statement. No functional change intended.

This doesn't look right to me.

> diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
> index e2730b3e1a57..18afa544b623 100644
> --- a/drivers/net/ethernet/cadence/macb_main.c
> +++ b/drivers/net/ethernet/cadence/macb_main.c
> @@ -510,32 +510,55 @@ static void macb_validate(struct phylink_config *config,
>  			  unsigned long *supported,
>  			  struct phylink_link_state *state)
>  {
> +	bool one = state->interface == PHY_INTERFACE_MODE_NA;

Shouldn't this be != ?

Since PHY_INTERFACE_MODE_NA is supposed to return all capabilities.
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