From: Andrew Lunn <andrew@lunn.ch>
To: Paolo Abeni <pabeni@redhat.com>
Cc: lawson.fidelio@gmail.com, woojung.huh@microchip.com,
UNGLinuxDriver@microchip.com, olteanv@gmail.com,
davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
marex@denx.de, maxime.chevallier@bootlin.com, horms@kernel.org,
hkallweit1@gmail.com, linux@armlinux.org.uk,
Tristram.Ha@microchip.com, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, nb@tipi-net.de,
fidelio.lawson@exotec.com, marex@nabladev.com
Subject: Re: [PATCH net-next v9 3/3] net: phy: micrel: expose KSZ87xx low-loss cable tunables
Date: Thu, 4 Jun 2026 14:15:32 +0200 [thread overview]
Message-ID: <bbb42bb7-7ea2-4a7d-a66b-dea02129a667@lunn.ch> (raw)
In-Reply-To: <20260604114133.170770-1-pabeni@redhat.com>
> Since the capability check looks at get_tunable but unconditionally calls
> set_tunable, could this lead to a NULL pointer dereference if a PHY driver
> were to implement only read-only tunables by providing just get_tunable?
It is in the name, tunable. A write only tunable might make sense, but
a read only does not. So an Opps is the right thing to do, it makes it
clear there is a bug, and you get a nice stack trace to help you find
it.
Andrew
next prev parent reply other threads:[~2026-06-04 12:15 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-01 15:19 [PATCH net-next v9 0/3] ksz87xx: add support for low-loss cable equalizer errata Fidelio Lawson
2026-06-01 15:19 ` [PATCH net-next v9 1/3] net: dsa: microchip: implement KSZ87xx Module 3 low-loss cable errata Fidelio Lawson
2026-06-01 15:19 ` [PATCH net-next v9 2/3] net: ethtool: add KSZ87xx low-loss cable PHY tunables Fidelio Lawson
2026-06-04 11:41 ` Paolo Abeni
2026-06-04 12:11 ` Andrew Lunn
2026-06-05 2:35 ` Jakub Kicinski
2026-06-05 3:16 ` Marek Vasut
2026-06-05 23:31 ` Jakub Kicinski
2026-06-09 15:03 ` Fidelio LAWSON
2026-06-01 15:19 ` [PATCH net-next v9 3/3] net: phy: micrel: expose KSZ87xx low-loss cable tunables Fidelio Lawson
2026-06-04 11:41 ` Paolo Abeni
2026-06-04 12:15 ` Andrew Lunn [this message]
2026-06-01 15:43 ` [PATCH net-next v9 0/3] ksz87xx: add support for low-loss cable equalizer errata Nicolai Buchwitz
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