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Date: Wed, 5 May 2021 03:11:36 +0200 From: Andrew Lunn <andrew@...n.ch> To: Ansuel Smith <ansuelsmth@...il.com> Cc: Florian Fainelli <f.fainelli@...il.com>, Heiner Kallweit <hkallweit1@...il.com>, Russell King <linux@...linux.org.uk>, "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, linux-kernel@...r.kernel.org, netdev@...r.kernel.org Subject: Re: [RFC PATCH net-next v3 20/20] net: phy: add qca8k driver for qca8k switch internal PHY > +/* QCA specific MII registers access function */ > +static void qca8k_phy_dbg_write(struct mii_bus *bus, int phy_addr, u16 dbg_addr, u16 dbg_data) > +{ > + mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED); > + bus->write(bus, phy_addr, MII_ATH_DBG_ADDR, dbg_addr); > + bus->write(bus, phy_addr, MII_ATH_DBG_DATA, dbg_data); > + mutex_unlock(&bus->mdio_lock); > +} What are you locking against here? Andrew
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