linux-kernel - Re: [PATCH v5 2/9] mfd: omap-usb-host: Get clocks based on hardware revision

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Date:	Mon, 20 Jan 2014 11:14:17 +0200
From:	Roger Quadros <rogerq@...com>
To:	Lee Jones <lee.jones@...aro.org>, Arnd Bergmann <arnd@...db.de>
CC:	<bcousson@...libre.com>, <tony@...mide.com>, <balbi@...com>,
	<sre@...ian.org>, <mark.rutland@....com>,
	<m.paolino@...tualopensystems.com>, <linux-omap@...r.kernel.org>,
	<linux-usb@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>,
	Samuel Ortiz <sameo@...ux.intel.com>
Subject: Re: [PATCH v5 2/9] mfd: omap-usb-host: Get clocks based on hardware
 revision

On 01/10/2014 04:26 PM, Lee Jones wrote:
> On Fri, 10 Jan 2014, Arnd Bergmann wrote:
> 
>> On Friday 10 January 2014, Lee Jones wrote:
>>>>  
>>>> -     need_logic_fck = false;
>>>> +     /* Set all clocks as invalid to begin with */
>>>> +     omap->ehci_logic_fck = omap->init_60m_fclk = ERR_PTR(-EINVAL);
>>>> +     omap->utmi_p1_gfclk = omap->utmi_p2_gfclk = ERR_PTR(-EINVAL);
>>>> +     omap->xclk60mhsp1_ck = omap->xclk60mhsp2_ck = ERR_PTR(-EINVAL);
>>>
>>> I don't think this is the correct error code.
>>>
>>> -EINVAL means 'invalid parameter'.
>>>
>>> You probably want -ENODEV or -ENOSYS ('function not implemented'
>>> probably isn't ideal either tbh, but you get the idea). Perhaps you
>>> can set them as NULL and check for IS_ERR_OR_NULL() instead?
>>
>> I think ENODEV is ok here, I'd much prefer this over IS_ERR_OR_NULL().
> 
> Sounds good to me.
> 
OK. Will fix.

cheers,
-roger
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