linux-kernel - Re: [RESEND PATCH net-next] phy: keep the BCMR

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Date:	Thu, 14 Apr 2016 10:18:29 +0800
From:	Weidong Wang <wangweidong1@...wei.com>
To:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
CC:	David Miller <davem@...emloft.net>, <f.fainelli@...il.com>,
	<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [RESEND PATCH net-next] phy: keep the BCMR_LOOPBACK bit while
 setup forced mode

On 2016/4/13 22:19, Sergei Shtylyov wrote:
> Hello.
> 
> On 4/13/2016 2:59 PM, Weidong Wang wrote:
> 
>> When tested the PHY SGMII Loopback,:
>> 1.set the LOOPBACK bit,
>> 2.set the autoneg to AUTONEG_DISABLE, it calls the
>> genphy_setup_forced which will clear the bit.
>>
>> So just keep the LOOPBACK bit while setup forced mode.
>>
>> Signed-off-by: Weidong Wang <wangweidong1@...wei.com>
>> ---
>>   drivers/net/phy/phy_device.c | 2 ++
>>   1 file changed, 2 insertions(+)
>>
>> diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
>> index e551f3a..8da4b80 100644
>> --- a/drivers/net/phy/phy_device.c
>> +++ b/drivers/net/phy/phy_device.c
>> @@ -1124,7 +1124,9 @@ static int genphy_config_advert(struct phy_device *phydev)
>>   int genphy_setup_forced(struct phy_device *phydev)
>>   {
>>       int ctl = 0;
>> +    int val = phy_read(phydev, MII_BMCR);
> 
>    Please place this declaration first, DaveM prefers declarations to be sorted from longest to shortest.
> 
>>
>> +    ctl |= val & BMCR_LOOPBACK;
> 
>    Just =, removing the 'ctl' initializer, please.
> 
> [...]
> 
> MBR, Sergei
> 
Got it.

Regards,
Weidong
> 
>