linux-kernel - Re: [PATCH 24/25] video/ivtv: Convert pci_table entries to PCI_VDEVICE (if PCI_ANY

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Date:	Thu, 15 Jul 2010 18:07:39 -0400
From:	Jarod Wilson <jarod@...sonet.com>
To:	Andy Walls <awalls@...metrocast.net>
Cc:	Peter Huewe <PeterHuewe@....de>,
	Kernel Janitors <kernel-janitors@...r.kernel.org>,
	Mauro Carvalho Chehab <mchehab@...radead.org>,
	Ian Armstrong <ian@...mst.demon.co.uk>,
	Douglas Schilling Landgraf <dougsland@...hat.com>,
	Steven Toth <stoth@...nellabs.com>, ivtv-devel@...vdriver.org,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 24/25] video/ivtv: Convert pci_table entries to 
	PCI_VDEVICE (if PCI_ANY_ID is used)

On Thu, Jul 15, 2010 at 5:43 PM, Andy Walls <awalls@...metrocast.net> wrote:
> On Thu, 2010-07-15 at 21:08 +0200, Peter Huewe wrote:
>> From: Peter Huewe <peterhuewe@....de>
>>
>> This patch converts pci_table entries, where .subvendor=PCI_ANY_ID and
>> .subdevice=PCI_ANY_ID, .class=0 and .class_mask=0, to use the
>> PCI_VDEVICE macro, and thus improves readability.
>
> Hi Peter,
>
> I have to disagree.  The patch may improve typesetting, but it degrades
> clarity and maintainability from my perspective.
>
> a. PCI_ANY_ID indicates to the reader a wildcard match is being
> performed.  The PCI_VDEVICE() macro hides that to some degree.
>
> b. PCI_VENDOR_ID_ICOMP clearly indicates that ICOMP is a vendor.
> "ICOMP" alone does not hint to the reader that is stands for a company
> (the now defunct "Internext Compression, Inc.").

Personally, I'm a fan of comments around things like this to describe
*exactly* what device(s) they're referring to. Then ICOMP being all
alone without the prefix isn't really much of an issue (though it
could still be easily mistaken for something other than a pci vendor
id, I suppose).

-- 
Jarod Wilson
jarod@...sonet.com
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