netdev - Re: [PATCH 1/2] of_mdio: use IS_ERR_OR

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Date:	Sat, 12 Mar 2016 00:53:10 +0200
From:	Vladimir Zapolskiy <vz@...ia.com>
To:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
	grant.likely@...aro.org, robh+dt@...nel.org,
	devicetree@...r.kernel.org, f.fainelli@...il.com,
	netdev@...r.kernel.org, frowand.list@...il.com
Subject: Re: [PATCH 1/2] of_mdio: use IS_ERR_OR_NULL()

Hello Sergei,

On 12.03.2016 00:12, Sergei Shtylyov wrote:
> IS_ERR_OR_NULL() is open coded in of_mdiobus_register_{phy|device}(), so
> just call it directly...
> 
> Signed-off-by: Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
> 
> ---
>  drivers/of/of_mdio.c |    4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> Index: net-next/drivers/of/of_mdio.c
> ===================================================================
> --- net-next.orig/drivers/of/of_mdio.c
> +++ net-next/drivers/of/of_mdio.c
> @@ -56,7 +56,7 @@ static int of_mdiobus_register_phy(struc
>  		phy = phy_device_create(mdio, addr, phy_id, 0, NULL);
>  	else
>  		phy = get_phy_device(mdio, addr, is_c45);
> -	if (!phy || IS_ERR(phy))
> +	if (IS_ERR_OR_NULL(phy))
>  		return 1;
>  
>  	rc = irq_of_parse_and_map(child, 0);
> @@ -98,7 +98,7 @@ static int of_mdiobus_register_device(st
>  	int rc;
>  
>  	mdiodev = mdio_device_create(mdio, addr);
> -	if (!mdiodev || IS_ERR(mdiodev))
> +	if (IS_ERR_OR_NULL(mdiodev))
>  		return 1;
>  

I don't see how it is possible for mdio_device_create() to return NULL,
instead of this change consider to remove if (!mdiodev) check.

>  	/* Associate the OF node with the device structure so it
> 

--
With best wishes,
Vladimir