linux-kernel - Re: [PATCH] net: phy: tja11xx: replace deprecated strncpy with ethtool

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Message-ID: <a958d35e-98b6-4a95-b505-776482d1150c@lunn.ch>
Date:   Sat, 14 Oct 2023 03:55:41 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Kees Cook <keescook@...omium.org>
Cc:     Justin Stitt <justinstitt@...gle.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH] net: phy: tja11xx: replace deprecated strncpy with
 ethtool_sprintf

> I've been told that this whole ethtool API area is considered
> deprecated. If that holds, then I don't think it's worth adding new
> helpers to support it when ethtool_sprintf() is sufficient.

I think deprecated is too strong. The current API is not great, so
maybe with time a new API will emerge. But given there are around 160
users of the API, probably over 100 drivers, it will be 20 years or
more before all that hardware becomes obsolete and the drivers are
removed.

> Once you're done with the strncpy->ethtool_sprintf conversions I think
> it would be nice to have a single patch that fixes all of these
> "%s"-less instances to use "%s". (Doing per-driver fixes for that case
> seems just overly painful.)

I guess it is the same amount of effort to replace them with
ethtool_puts()?

checkpatch warns about seq_printf() which could be seq_puts(), so
somebody thinks using puts is the right thing to do?

	 Andrew