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Date:   Sun, 1 Aug 2021 18:25:52 +0200
From:   Heiner Kallweit <>
To:     Jakub Kicinski <>,
        David Miller <>
Cc:     "" <>
Subject: Re: [PATCH net-next 0/4] ethtool: runtime-resume netdev parent before
 ethtool ops

On 01.08.2021 12:35, Heiner Kallweit wrote:
> If a network device is runtime-suspended then:
> - network device may be flagged as detached and all ethtool ops (even if
>   not accessing the device) will fail because netif_device_present()
>   returns false
> - ethtool ops may fail because device is not accessible (e.g. because being
>   in D3 in case of a PCI device)
> It may not be desirable that userspace can't use even simple ethtool ops
> that not access the device if interface or link is down. To be more friendly
> to userspace let's ensure that device is runtime-resumed when executing
> ethtool ops in kernel.
> This patch series covers the typical case that the netdev parent is power-
> managed, e.g. a PCI device. Not sure whether cases exist where the netdev
> itself is power-managed. If yes then we may need an extension for this.
> But the series as-is at least shouldn't cause problems in that case.
> Heiner Kallweit (4):
>   ethtool: runtime-resume netdev parent before ethtool ioctl ops
>   ethtool: move implementation of ethnl_ops_begin/complete to netlink.c
>   ethtool: move netif_device_present check from
>     ethnl_parse_header_dev_get to ethnl_ops_begin
>   ethtool: runtime-resume netdev parent in ethnl_ops_begin
>  net/ethtool/ioctl.c   | 18 ++++++++++++++---
>  net/ethtool/netlink.c | 45 +++++++++++++++++++++++++++++++++++++------
>  net/ethtool/netlink.h | 15 ++-------------
>  3 files changed, 56 insertions(+), 22 deletions(-)

Patchwork is showing the following warning for all patches in the series.

netdev/cc_maintainers	warning	7 maintainers not CCed:

This seems to be a false positive, e.g. address
doesn't exist at all in MAINTAINERS file.

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