netdev - Re: [PATCH net,stable] net: usb: Add HP hs2434 device to ZLP exception table

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Date:	Wed, 28 Aug 2013 18:40:22 -0600
From:	Rob Gardner <robmatic@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, linux-usb@...r.kernel.org, bjorn@...k.no,
	oliver@...kum.org
Subject: Re: [PATCH net,stable] net: usb: Add HP hs2434 device to ZLP
 exception table

On Wed, 28 Aug 2013 20:01:11 -0400 (EDT)
David Miller <davem@...emloft.net> wrote:

> From: Rob Gardner <robmatic@...il.com>
> Date: Wed, 28 Aug 2013 17:18:12 -0600
> 
> > Bjørn says it could have a minor performance impact, but should not
> > cause any loss of functionality. I don't think there's any hard data on
> > what the performance cost might be but I know he would eventually like
> > to get rid of the exception list and live with the possible performance
> > impact if it means functionality for more devices.
> 
> Therefore I would recommend turning the workaround on by default and
> have a white list.

The exception list means "usb_device_id entries for specific devices
that are known to need the workaround." There are just two such entries.
There isn't even a separate list. So maybe we just have a nomenclature
problem, and we could simply be calling this a "white list" instead of
"exception list". The other possible meaning of whitelist (all devices
that *don't* need the workaround) is unthinkable, as that would be a huge
list and much more prone to be unmanageable than what we've got now.

-- 
Rob Gardner <robmatic@...il.com>
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