linux-kernel - Re: [PATCH] stmmac: add missing of_node

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Message-ID: <3b6da79c-93aa-b3e4-a36d-15325873711d@st.com>
Date:   Tue, 17 Jan 2017 14:54:50 +0100
From:   Alexandre Torgue <alexandre.torgue@...com>
To:     Julia Lawall <Julia.Lawall@...6.fr>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>
CC:     <kernel-janitors@...r.kernel.org>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] stmmac: add missing of_node_put

Hi

On 01/17/2017 12:23 PM, Julia Lawall wrote:
> The function stmmac_dt_phy provides several possibilities for initializing
> plat->mdio_node, all of which have the effect of increasing the reference
> count of the assigned value.  This field is not updated elsewhere, so the
> value is live until the end of the lifetime of plat (devm_allocated), just
> after the end of stmmac_remove_config_dt.  Thus, add an of_node_put on
> plat->mdio_node in stmmac_remove_config_dt.  It is possible that the field
> mdio_node is never initialized, but of_node_put is NULL-safe, so it is also
> safe to call of_node_put in that case.
>
> Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>
>
> ---
>  drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c |    1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> index 4daa8a3..460f94f 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> @@ -409,6 +409,7 @@ void stmmac_remove_config_dt(struct platform_device *pdev,
>  	if (of_phy_is_fixed_link(np))
>  		of_phy_deregister_fixed_link(np);
>  	of_node_put(plat->phy_node);
> +	of_node_put(plat->mdio_node);
>  }
>  #else
>  struct plat_stmmacenet_data *
>

Acked-by: Alexandre TORGUE <alexandre.torgue@...com>

Thanks
Alex