There's no need to get the of_node explicitly. platform_get_resource
already does this.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
 drivers/net/mdio/mdio-ipq8064.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/net/mdio/mdio-ipq8064.c b/drivers/net/mdio/mdio-ipq8064.c
index 6253a9ab8b69..e3d311ce3810 100644
--- a/drivers/net/mdio/mdio-ipq8064.c
+++ b/drivers/net/mdio/mdio-ipq8064.c
@@ -111,15 +111,16 @@ ipq8064_mdio_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
 	struct ipq8064_mdio *priv;
-	struct resource res;
+	struct resource *res;
 	struct mii_bus *bus;
 	void __iomem *base;
 	int ret;
 
-	if (of_address_to_resource(np, 0, &res))
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
 		return -ENOMEM;
 
-	base = devm_ioremap(&pdev->dev, res.start, resource_size(&res));
+	base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
 	if (!base)
 		return -ENOMEM;
 
-- 
2.47.0

On 03.12.2024 23:16, Rosen Penev wrote:
> There's no need to get the of_node explicitly. platform_get_resource
> already does this.
> 
> Signed-off-by: Rosen Penev <rosenp@gmail.com>
> ---
>  drivers/net/mdio/mdio-ipq8064.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/net/mdio/mdio-ipq8064.c b/drivers/net/mdio/mdio-ipq8064.c
> index 6253a9ab8b69..e3d311ce3810 100644
> --- a/drivers/net/mdio/mdio-ipq8064.c
> +++ b/drivers/net/mdio/mdio-ipq8064.c
> @@ -111,15 +111,16 @@ ipq8064_mdio_probe(struct platform_device *pdev)
>  {
>  	struct device_node *np = pdev->dev.of_node;
>  	struct ipq8064_mdio *priv;
> -	struct resource res;
> +	struct resource *res;
>  	struct mii_bus *bus;
>  	void __iomem *base;
>  	int ret;
>  
> -	if (of_address_to_resource(np, 0, &res))
> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	if (!res)
>  		return -ENOMEM;
>  
> -	base = devm_ioremap(&pdev->dev, res.start, resource_size(&res));
> +	base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
>  	if (!base)
>  		return -ENOMEM;
>  

Why not directly switching to devm_platform_get_and_ioremap_resource()?

On Tue, Dec 3, 2024 at 2:27 PM Heiner Kallweit <hkallweit1@gmail.com> wrote:
>
> On 03.12.2024 23:16, Rosen Penev wrote:
> > There's no need to get the of_node explicitly. platform_get_resource
> > already does this.
> >
> > Signed-off-by: Rosen Penev <rosenp@gmail.com>
> > ---
> >  drivers/net/mdio/mdio-ipq8064.c | 7 ++++---
> >  1 file changed, 4 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/net/mdio/mdio-ipq8064.c b/drivers/net/mdio/mdio-ipq8064.c
> > index 6253a9ab8b69..e3d311ce3810 100644
> > --- a/drivers/net/mdio/mdio-ipq8064.c
> > +++ b/drivers/net/mdio/mdio-ipq8064.c
> > @@ -111,15 +111,16 @@ ipq8064_mdio_probe(struct platform_device *pdev)
> >  {
> >       struct device_node *np = pdev->dev.of_node;
> >       struct ipq8064_mdio *priv;
> > -     struct resource res;
> > +     struct resource *res;
> >       struct mii_bus *bus;
> >       void __iomem *base;
> >       int ret;
> >
> > -     if (of_address_to_resource(np, 0, &res))
> > +     res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > +     if (!res)
> >               return -ENOMEM;
> >
> > -     base = devm_ioremap(&pdev->dev, res.start, resource_size(&res));
> > +     base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
> >       if (!base)
> >               return -ENOMEM;
> >
>
> Why not directly switching to devm_platform_get_and_ioremap_resource()?
Because that is not the same.

devm_platform_get_and_ioremap_resource is

platform_get_resource + request_memory_region + ioremap

The issue here is the second. This driver (well, platform really) uses
overlapping memory regions and so request_memory_region will fail.