netdev - Re: [PATCH v2 1/2] net: macb: Clean up macb

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Date:   Tue, 12 Oct 2021 10:33:04 +0200
From:   Antoine Tenart <atenart@...nel.org>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Sean Anderson <sean.anderson@...o.com>, netdev@...r.kernel.org
Cc:     Russell King <linux@...linux.org.uk>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>,
        Sean Anderson <sean.anderson@...o.com>
Subject: Re: [PATCH v2 1/2] net: macb: Clean up macb_validate

Hello Sean,

Quoting Sean Anderson (2021-10-11 18:55:16)
> 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.

I'm not 100% convinced this makes macb_validate more readable: there are
lots of conditions, and jumps, in the switch.

Maybe you could try a mixed approach; keeping the invalid modes checks
(bitmap_zero) at the beginning and once we know the mode is valid using
a switch statement. That might make it easier to read as this should
remove lots of conditionals. (We'll still have the one/_NA checks
though).

(Also having patch 1 first will improve things).

Thanks,
Antoine