netdev - Re: [PATCH net-next v1 2/4] mlxbf_gige: support 10M/100M/1G speeds on BlueField-3

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Message-ID: <Y1sQ4tdhYzvNwrZJ@lunn.ch>
Date:   Fri, 28 Oct 2022 01:14:42 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     David Thompson <davthompson@...dia.com>
Cc:     davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, netdev@...r.kernel.org, cai.huoqing@...ux.dev,
        brgl@...ev.pl, limings@...dia.com, Asmaa Mnebhi <asmaa@...dia.com>
Subject: Re: [PATCH net-next v1 2/4] mlxbf_gige: support 10M/100M/1G speeds
 on BlueField-3

> +static void mlxbf_gige_bf3_adjust_link(struct net_device *netdev)
> +{
> +	struct mlxbf_gige *priv = netdev_priv(netdev);
> +	struct phy_device *phydev = netdev->phydev;
> +	unsigned long flags;
> +	u8 sgmii_mode;
> +	u16 ipg_size;
> +	u32 val;
> +
> +	spin_lock_irqsave(&priv->lock, flags);

What are you protecting with this spinlock?

phylib holds the phy mutex while it calls the adjust_link method, so
calls to it are serialised.

      Andrew