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

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Message-ID: <56E34EC3.2000008@gmail.com>
Date:	Fri, 11 Mar 2016 15:03:31 -0800
From:	Florian Fainelli <f.fainelli@...il.com>
To:	Vladimir Zapolskiy <vz@...ia.com>,
	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
	grant.likely@...aro.org, robh+dt@...nel.org,
	devicetree@...r.kernel.org, netdev@...r.kernel.org,
	frowand.list@...il.com
Subject: Re: [PATCH 1/2] of_mdio: use IS_ERR_OR_NULL()

On 11/03/16 14:53, Vladimir Zapolskiy wrote:
> 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.

Good point, worst case we return PTR_ERR(-ENOMEM).
-- 
Florian