[PATCH] stmmac: add missing of_node_put

[PATCH] stmmac: add missing of_node_put

[Julia Lawall]

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@lip6.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 *

Re: [PATCH] stmmac: add missing of_node_put

[Alexandre Torgue]

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@lip6.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@st.com>

Thanks
Alex

Re: [PATCH] stmmac: add missing of_node_put

[David Miller]

From: Julia Lawall <Julia.Lawall@lip6.fr>
Date: Tue, 17 Jan 2017 12:23:21 +0100

> 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@lip6.fr>

Applied, thanks Julia.