netdev - Re: [PATCH] net: ethernet: ravb: Fix release of refclk

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Date:   Mon, 19 Apr 2021 12:38:33 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...il.com>
To:     Adam Ford <aford173@...il.com>, netdev@...r.kernel.org
Cc:     aford@...conembedded.com, geert@...ux-m68k.org,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, Andrew Lunn <andrew@...n.ch>,
        linux-renesas-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: ethernet: ravb: Fix release of refclk

Hello!

On 17.04.2021 16:23, Adam Ford wrote:

> The call to clk_disable_unprepare() can happen before priv is
> initialized.

    Mhm, how's that? :-/

> This means moving clk_disable_unprepare out of
> out_release into a new label.
> 
> Fixes: 8ef7adc6beb2("net: ethernet: ravb: Enable optional refclk")
> Signed-off-by: Adam Ford <aford173@...il.com>
> 
> diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
> index 8c84c40ab9a0..64a545c98ff2 100644
> --- a/drivers/net/ethernet/renesas/ravb_main.c
> +++ b/drivers/net/ethernet/renesas/ravb_main.c
[...]
> @@ -2252,8 +2252,9 @@ static int ravb_probe(struct platform_device *pdev)
>   	/* Stop PTP Clock driver */
>   	if (chip_id != RCAR_GEN2)
>   		ravb_ptp_stop(ndev);
> -out_release:
> +out_unprepare_refclk:

    I'd really prefer out_disable_refclk.

>   	clk_disable_unprepare(priv->refclk);
> +out_release:
>   	free_netdev(ndev);
>   
>   	pm_runtime_put(&pdev->dev);

MBR, Sergei