net: ethtool: relax ethnl_req_get_phydev() locking assertion

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phydev <> netdev linking and lifecycle depends on rtnl_lock.
We want to switch to instance locks for most ethtool ops.
Let's add an assert that ops locked devices don't use phydev
today. If one does we can either opt the phy ops out of
being purely ops locked, or do deeper surgery to make phy
locking ops-compatible. I don't think there's any fundamental
challenge to make that work.

Reviewed-by: Nicolai Buchwitz <nb@tipi-net.de>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20260605002912.3456868-3-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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This commit is contained in:

Jakub Kicinski 2026-06-04 17:29:02 -07:00

parent 8845484367

commit ded86da4bb

5 changed files with 21 additions and 6 deletions

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8

drivers/net/phy/phy_link_topology.c

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5

include/linux/phy_link_topology.h

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6

net/ethtool/netlink.c

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7

net/ethtool/netlink.h

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1

net/ethtool/phy.c

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