linux-kernel - Re: [PATCH 03/10] mfd: cros_ec: Allow static din/dout buffers with cros_ec

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Date:	Wed, 18 Jun 2014 09:35:27 -0700
From:	Doug Anderson <dianders@...omium.org>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	Andrew Bresticker <abrestic@...omium.org>,
	Stephen Warren <swarren@...dotorg.org>,
	Olof Johansson <olof@...om.net>,
	Sonny Rao <sonnyrao@...omium.org>,
	linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
	Javier Martinez Canillas <javier.martinez@...labora.co.uk>,
	Bill Richardson <wfrichar@...omium.org>,
	Simon Glass <sjg@...omium.org>,
	Wolfram Sang <wsa@...-dreams.de>,
	"broonie@...nel.org" <broonie@...nel.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 03/10] mfd: cros_ec: Allow static din/dout buffers with cros_ec_register()

Lee,

On Wed, Jun 18, 2014 at 12:53 AM, Lee Jones <lee.jones@...aro.org> wrote:
> On Mon, 16 Jun 2014, Doug Anderson wrote:
>
>> From: Bill Richardson <wfrichar@...omium.org>
>>
>> The lower-level driver may want to provide its own buffers. If so,
>> there's no need to allocate new ones.  This already happens to work
>> just fine (since we check for size of 0 and use devm allocation), but
>> it's good to document it.
>>
>> [dianders: Resolved conflicts; documented that no code changes needed
>> on mainline]
>>
>> Signed-off-by: Bill Richardson <wfrichar@...omium.org>
>> Signed-off-by: Doug Anderson <dianders@...omium.org>
>> ---
>>  include/linux/mfd/cros_ec.h | 4 ++--
>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h
>> index 7e9fe6e..2ee3190 100644
>> --- a/include/linux/mfd/cros_ec.h
>> +++ b/include/linux/mfd/cros_ec.h
>> @@ -68,8 +68,8 @@ struct cros_ec_msg {
>>   * We use this alignment to keep ARM and x86 happy. Probably word
>>   * alignment would be OK, there might be a small performance advantage
>>   * to using dword.
>> - * @din_size: size of din buffer
>> - * @dout_size: size of dout buffer
>> + * @din_size: size of din buffer to allocate (zero to use static din)
>> + * @dout_size: size of dout buffer to allocate (zero to use static dout)
>
> Why don't these use your new format i.e. doutsize, etc?

Ah, you mean like the new "struct cros_ec_command" that's switched to
in (mfd: cros_ec: Use struct cros_ec_command to communicate with the
EC)?  I don't know--it seems rather arbitrary.  Personally I like
having the underscore (thus if we have to change I'd advocate changing
"struct cros_ec_command").

The inconsistency doesn't bother me terribly and it will be more work
to cherry-pick future patches.  Since it didn't sound like you are
insisting then I won't change this, but if you say that you want me to
change it I'm more than happy to.

-Doug
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