netdev - Re: [PATCH v2 net-next 6/9] net: ethernet: mtk_eth_soc: add MTK_NETSYS

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Message-ID: <ZK+m+ayRW/uaxl6u@shell.armlinux.org.uk>
Date: Thu, 13 Jul 2023 08:25:45 +0100
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Daniel Golle <daniel@...rotopia.org>
Cc: netdev@...r.kernel.org, linux-mediatek@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>, Felix Fietkau <nbd@....name>,
	John Crispin <john@...ozen.org>, Sean Wang <sean.wang@...iatek.com>,
	Mark Lee <Mark-MC.Lee@...iatek.com>,
	Lorenzo Bianconi <lorenzo@...nel.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Bjørn Mork <bjorn@...k.no>,
	Florian Fainelli <f.fainelli@...il.com>,
	Greg Ungerer <gerg@...nel.org>
Subject: Re: [PATCH v2 net-next 6/9] net: ethernet: mtk_eth_soc: add
 MTK_NETSYS_V3 capability bit

on thu, jul 13, 2023 at 03:19:49am +0100, daniel golle wrote:
> +
> +		if (mtk_has_caps(eth->soc->caps, mtk_netsys_v3)) {

this is a case in point for one of my previous comments...

this code started out believing that testing for mtk_netsys_v2 for v2
features would be sufficient. your first patch ended up having to
change that to !v1. how long until this becomes !v1 && !v2 because
it gets used on v3 and v4 etc?

this is why i think an integer version field would be a much saner
approach.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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