linux-kernel - Re: [PATCH 13/13] drivers/media/tuners/e4000.c: use macros for i2c

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Date:	Sun, 7 Oct 2012 23:43:58 +0200 (CEST)
From:	Julia Lawall <julia.lawall@...6.fr>
To:	Joe Perches <joe@...ches.com>
cc:	Julia Lawall <julia.lawall@...6.fr>, walter harms <wharms@....de>,
	Antti Palosaari <crope@....fi>,
	kernel-janitors@...r.kernel.org, rmallon@...il.com,
	shubhrajyoti@...com, Mauro Carvalho Chehab <mchehab@...radead.org>,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 13/13] drivers/media/tuners/e4000.c: use macros for
 i2c_msg initialization

On Sun, 7 Oct 2012, Joe Perches wrote:

> On Sun, 2012-10-07 at 20:56 +0200, Julia Lawall wrote:
>>>> Some people thought that it would be nice to have the macros rather than
>>>> the inlined field initializations, especially since there is no flag for
>>>> write.  A separate question is whether an array of one element is useful,
>>>> or whether one should systematically use & on a simple variable of the
>>>> structure type.  I'm open to suggestions about either point.
>>>
>>> I think the macro naming is not great.
>>>
>>> Maybe add DEFINE_/DECLARE_/_INIT or something other than an action
>>> name type to the macro names.
>>
>> DEFINE and DECLARE usually have a declared variable as an argument, which
>> is not the case here.
>>
>> These macros are like the macros PCI_DEVICE and PCI_DEVICE_CLASS.
>
> I understand that.
>
>> Are READ and WRITE the action names?  They are really the important
>> information in this case.
>
> Yes, most (all?) uses of _READ and _WRITE macros actually
> perform some I/O.

I2C_MSG_READ_DATA?
I2C_MSG_READ_INFO?
I2C_MSG_READ_INIT?
I2C_MSG_PREPARE_READ?

julia
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