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Message-ID: <20230525144122.3d2d8aba@pc-7.home> Date: Thu, 25 May 2023 14:41:22 +0200 From: Maxime Chevallier <maxime.chevallier@...tlin.com> To: "Russell King (Oracle)" <linux@...linux.org.uk> Cc: Mark Brown <broonie@...nel.org>, davem@...emloft.net, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, alexis.lothore@...tlin.com, thomas.petazzoni@...tlin.com, Andrew Lunn <andrew@...n.ch>, Jakub Kicinski <kuba@...nel.org>, Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>, Florian Fainelli <f.fainelli@...il.com>, Heiner Kallweit <hkallweit1@...il.com>, Vladimir Oltean <vladimir.oltean@....com>, Ioana Ciornei <ioana.ciornei@....com>, linux-stm32@...md-mailman.stormreply.com, linux-arm-kernel@...ts.infradead.org, Maxime Coquelin <mcoquelin.stm32@...il.com>, Jose Abreu <joabreu@...opsys.com>, Alexandre Torgue <alexandre.torgue@...s.st.com>, Giuseppe Cavallaro <peppe.cavallaro@...com> Subject: Re: [PATCH net-next v2 1/4] net: mdio: Introduce a regmap-based mdio driver Hello Russell, On Thu, 25 May 2023 12:11:38 +0100 "Russell King (Oracle)" <linux@...linux.org.uk> wrote: > On Thu, May 25, 2023 at 12:11:23PM +0200, Maxime Chevallier wrote: > > +struct mii_bus *devm_mdio_regmap_register(struct device *dev, > > + const struct > > mdio_regmap_config *config) +{ > > + struct mdio_regmap_config *mrc; > > + struct mii_bus *mii; > > + int rc; > > + > > + if (!config->parent) > > + return ERR_PTR(-EINVAL); > > + > > + mii = devm_mdiobus_alloc_size(config->parent, > > sizeof(*mrc)); > > + if (!mii) > > + return ERR_PTR(-ENOMEM); > > + > > + mrc = mii->priv; > > + memcpy(mrc, config, sizeof(*mrc)); > > + > > + mrc->regmap = config->regmap; > > + mrc->valid_addr = config->valid_addr; > > You have just memcpy'd everything from config into mrc. Doesn't this > already include "regmap" and "valid_addr" ? Oh right... good catch, thanks ! > However, these are the only two things used, so does it really make > sense to allocate the full mdio_regmap_config structure, or would a > smaller data structure (of one pointer and one u8) be more > appropriate? > You are correct, other fields are unused so I'll use a new struct for the mii->priv field. Thank you for reviewing, Best regards, Maxime
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