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Date: Tue, 21 Apr 2020 15:43:02 +0100 From: Russell King - ARM Linux admin <linux@...linux.org.uk> To: Andrew Lunn <andrew@...n.ch> Cc: Michael Walle <michael@...le.cc>, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, Florian Fainelli <f.fainelli@...il.com>, Heiner Kallweit <hkallweit1@...il.com>, "David S . Miller" <davem@...emloft.net>, Vladimir Oltean <vladimir.oltean@....com> Subject: Re: [RFC PATCH net-next 1/3] net: phy: add concept of shared storage for PHYs On Tue, Apr 21, 2020 at 04:34:55PM +0200, Andrew Lunn wrote: > > +static inline bool phy_package_init_once(struct phy_device *phydev) > > +{ > > + struct phy_package_shared *shared = phydev->shared; > > + > > + if (!shared) > > + return false; > > + > > + return !test_and_set_bit(PHY_SHARED_F_INIT_DONE, &shared->flags); > > +} > > I need to look at how you actually use this, but i wonder if this is > sufficient. Can two PHYs probe at the same time? Could we have one PHY > be busy setting up the global init, and the other thinks the global > setup is complete? Do we want a comment like: 'Returns true when the > global package initialization is either under way or complete'? IIRC, probe locking in the driver model is by per-driver locks, so any particular driver won't probe more than one device at a time. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 10.2Mbps down 587kbps up
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