linux-kernel - Re: [PATCH 2/3] ata: sata_dwc

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Message-ID: <yw1xwpseeivm.fsf@unicorn.mansr.com>
Date:	Wed, 16 Dec 2015 11:24:29 +0000
From:	Måns Rullgård <mans@...sr.com>
To:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
Cc:	Tejun Heo <tj@...nel.org>, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: Re: [PATCH 2/3] ata: sata_dwc_460ex: add phy support

Sergei Shtylyov <sergei.shtylyov@...entembedded.com> writes:

> Hello.
>
> On 12/16/2015 2:25 AM, Mans Rullgard wrote:
>
>> This adds support for powering on an optional PHY when activating the
>> device.
>>
>> Signed-off-by: Mans Rullgard <mans@...sr.com>
> [...]
>> diff --git a/drivers/ata/sata_dwc_460ex.c b/drivers/ata/sata_dwc_460ex.c
>> index 9985749..d07aae1 100644
>> --- a/drivers/ata/sata_dwc_460ex.c
>> +++ b/drivers/ata/sata_dwc_460ex.c
> [...]
>> @@ -1318,6 +1320,21 @@ static int sata_dwc_probe(struct platform_device *ofdev)
>>   	}
>>   #endif
>>
>> +	hsdev->phy = devm_phy_optional_get(hsdev->dev, "sata-phy");
>> +	if (IS_ERR(hsdev->phy)) {
>> +		err = PTR_ERR(hsdev->phy);
>> +		hsdev->phy = NULL;
>> +		goto error_out;
>> +	}
>> +
>> +	err = phy_init(hsdev->phy);
>> +	if (err)
>> +		goto error_out;
>
>    If phy_init() fails, do we really need to call phy_exit()?

No, but it doesn't hurt either, and it makes the code slightly simpler.
I can change it though.

>> +
>> +	err = phy_power_on(hsdev->phy);
>> +	if (err)
>> +		goto error_out;
>> +
>>   	/*
>>   	 * Now, register with libATA core, this will also initiate the
>>   	 * device discovery process, invoking our port_start() handler &
>> @@ -1331,6 +1348,7 @@ static int sata_dwc_probe(struct platform_device *ofdev)
>>   	return 0;
>>
>>   error_out:
>> +	phy_exit(hsdev->phy);
>>   	iounmap(base);
>>   	return err;
>>   }
> [...]
>
> MBR, Sergei
>

-- 
Måns Rullgård
--
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