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Date: Sat, 18 Jul 2020 23:44:01 +0300 From: Vladimir Oltean <olteanv@...il.com> To: Florian Fainelli <f.fainelli@...il.com> Cc: netdev@...r.kernel.org, Andrew Lunn <andrew@...n.ch>, Vivien Didelot <vivien.didelot@...il.com>, "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, Jiri Pirko <jiri@...lanox.com>, Eric Dumazet <edumazet@...gle.com>, Taehee Yoo <ap420073@...il.com>, Cong Wang <xiyou.wangcong@...il.com>, Maxim Mikityanskiy <maximmi@...lanox.com>, Richard Cochran <richardcochran@...il.com>, Michal Kubecek <mkubecek@...e.cz>, open list <linux-kernel@...r.kernel.org> Subject: Re: [PATCH net-next 1/4] net: Wrap ndo_do_ioctl() to prepare for DSA stacked ops On Sat, Jul 18, 2020 at 01:36:25PM -0700, Florian Fainelli wrote: > > > On 7/18/2020 1:30 PM, Vladimir Oltean wrote: > > Hi Florian, > > > > On Fri, Jul 17, 2020 at 08:05:30PM -0700, Florian Fainelli wrote: > >> In preparation for adding another layer of call into a DSA stacked ops > >> singleton, wrap the ndo_do_ioctl() call into dev_do_ioctl(). > >> > >> Signed-off-by: Florian Fainelli <f.fainelli@...il.com> > >> --- > > > > I missed most of the context, but this looks interesting. Am I correct > > in saying that this could save us from having to manually pass > > phy_mii_ioctl() and that it could be generically handled here? > > The motivation for this work started with the realization while > untangling the ethtool/netlink and PHY library that tests like those: > dev->netdev_ops == &foo_ops would be defeated by the way DSA overloads > the DSA net_device operations. A better solution needed to be found. > > You are correct that we could just put a call to phy_mii_ioctl() here as > well and avoid having drivers have to use phy_do_ioctl_running or roll > their own. > -- > Florian I see. The background for my question is that we came to realize that it would be way cleaner if an Ethernet PHY with 1588 timestamping could just overload .ndo_do_ioctl() and the ethtool .get_ts_info() of the host network interface, very similarly to what DSA does. So it's very good that you started this work, it looks like it provides a very good foundation. Thanks! -Vladimir
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