netdev - Re: [PATCH net] net: stmmac: rk: put the PHY clock on remove

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Message-ID: <20250807183359.GO61519@horms.kernel.org>
Date: Thu, 7 Aug 2025 19:33:59 +0100
From: Simon Horman <horms@...nel.org>
To: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
Cc: Andrew Lunn <andrew@...n.ch>, David Wu <david.wu@...k-chips.com>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	linux-arm-kernel@...ts.infradead.org,
	linux-stm32@...md-mailman.stormreply.com,
	Maxime Coquelin <mcoquelin.stm32@...il.com>, netdev@...r.kernel.org,
	Paolo Abeni <pabeni@...hat.com>
Subject: Re: [PATCH net] net: stmmac: rk: put the PHY clock on remove

On Thu, Aug 07, 2025 at 09:48:30AM +0100, Russell King (Oracle) wrote:
> The PHY clock (bsp_priv->clk_phy) is obtained using of_clk_get(), which
> doesn't take part in the devm release. Therefore, when a device is
> unbound, this clock needs to be explicitly put. Fix this.
> 
> Fixes: fecd4d7eef8b ("net: stmmac: dwmac-rk: Add integrated PHY support")
> Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
> ---
> Spotted this resource leak while making other changes to dwmac-rk.
> Would be great if the dwmac-rk maintainers can test it.
> 
>  drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
> index 79b92130a03f..4a315c87c4d0 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
> @@ -1770,6 +1770,9 @@ static void rk_gmac_remove(struct platform_device *pdev)
>  	stmmac_dvr_remove(&pdev->dev);
>  
>  	rk_gmac_powerdown(bsp_priv);
> +
> +	if (plat->phy_node && bsp_priv->integrated_phy)
> +		clk_put(bsp_priv->clk_phy);

Hi Russell,

Something seems a little off here.
I don't see plat in this context in net.

>  }
>  
>  #ifdef CONFIG_PM_SLEEP
> -- 
> 2.30.2
>