netdev - Re: [PATCH net-next 1/3] net: phy: Create sysfs reciprocal links for attached

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Date:   Fri, 26 May 2017 16:44:18 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Woojung.Huh@...rochip.com, netdev@...r.kernel.org
Cc:     davem@...emloft.net, andrew@...n.ch
Subject: Re: [PATCH net-next 1/3] net: phy: Create sysfs reciprocal links for
 attached_dev/phydev

Hi Woojung,

On 05/26/2017 04:34 PM, Woojung.Huh@...rochip.com wrote:
>> @@ -960,6 +960,15 @@ int phy_attach_direct(struct net_device *dev, struct
>> phy_device *phydev,
>>
>>  	phydev->attached_dev = dev;
>>  	dev->phydev = phydev;
>> +	err = sysfs_create_link(&phydev->mdio.dev.kobj, &dev->dev.kobj,
>> +				"attached_dev");
>> +	if (err)
>> +		goto error;
>> +
>> +	err = sysfs_create_link(&dev->dev.kobj, &phydev->mdio.dev.kobj,
>> +				"phydev");
>> +	if (err)
>> +		goto error;
>>
> Florian,
> 
> I knew that it is applied to net-next.
> However, sysfs_create_link() fails when fixed phy (drivers/net/phy/fixed_phy.c)
> Do you have a chance to test with it?

I did, my main test system (BCM7445 w/ bcm_sf2) has one normal PHY
driver and 3 fixed PHYs (including one for the CPU port/master netdev),
see below.

What kind of error do you get here?

# ls -l /sys/class/net/gphy/phydev
lrwxrwxrwx    1 root     root             0 Jan  1 00:00
/sys/class/net/gphy/phydev ->
../../../f0b403c0.mdio/mdio_bus/f0b403c0.mdio/f0b403c0.mdio:05
# ls -l /sys/class/net/*/phydev
lrwxrwxrwx    1 root     root             0 Jan  1 00:01
/sys/class/net/eth0/phydev -> ../../../../Fixed MDIO
bus.0/mdio_bus/fixed-0/fixed-0:00
lrwxrwxrwx    1 root     root             0 Jan  1 00:00
/sys/class/net/gphy/phydev ->
../../../f0b403c0.mdio/mdio_bus/f0b403c0.mdio/f0b403c0.mdio:05
lrwxrwxrwx    1 root     root             0 Jan  1 00:01
/sys/class/net/moca/phydev -> ../../../../../Fixed MDIO
bus.0/mdio_bus/fixed-0/fixed-0:02
lrwxrwxrwx    1 root     root             0 Jan  1 00:01
/sys/class/net/rgmii_1/phydev -> ../../../mdio_bus/sf2-1/sf2-1:00
lrwxrwxrwx    1 root     root             0 Jan  1 00:01
/sys/class/net/rgmii_2/phydev -> ../../../../../Fixed MDIO
bus.0/mdio_bus/fixed-0/fixed-0:01

# ls -l /sys/class/mdio_bus/fixed-0/*/attached_dev
lrwxrwxrwx    1 root     root             0 Jan  1 00:01
/sys/class/mdio_bus/fixed-0/fixed-0:00/attached_dev ->
../../../../rdb/f04a0000.ethernet/net/eth0
lrwxrwxrwx    1 root     root             0 Jan  1 00:02
/sys/class/mdio_bus/fixed-0/fixed-0:01/attached_dev ->
../../../../rdb/rdb:switch_top@...00000/f0b00000.ethernet_switch/net/rgmii_2
lrwxrwxrwx    1 root     root             0 Jan  1 00:02
/sys/class/mdio_bus/fixed-0/fixed-0:02/attached_dev ->
../../../../rdb/rdb:switch_top@...00000/f0b00000.ethernet_switch/net/moca

# ls -l /sys/class/mdio_bus/f0b403c0.mdio/f0b403c0.mdio\:05/attached_dev
lrwxrwxrwx    1 root     root             0 Jan  1 00:02
/sys/class/mdio_bus/f0b403c0.mdio/f0b403c0.mdio:05/attached_dev ->
../../../../f0b00000.ethernet_switch/net/gphy

> 
> - Woojung
> 


-- 
Florian