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Date:	Thu, 25 Feb 2010 15:25:29 -0800
From:	Greg KH <greg@...ah.com>
To:	Robert Hancock <hancockrwd@...il.com>
Cc:	Tejun Heo <tj@...nel.org>, Oliver Neukum <oliver@...kum.org>,
	Yuhong Bao <yuhongbao_386@...mail.com>, david-b@...bell.net,
	linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: [PATCH 2.6.34] ehci-hcd: add option to enable 64-bit DMA
 support

On Thu, Feb 25, 2010 at 05:15:49PM -0600, Robert Hancock wrote:
> > For now, I'd like to not enable this, given the huge risks and no known
> > benifit.
> 
> "Huge risks" is likely a bit melodramatic

No it is not.  This has the ability to break USB functionality that
currently works just fine for a user.  That's not acceptable.

And yes, we can fix things after-the-fact with blacklists, but as Tejun
so aptly described, it is a major pain to do so, and lots of users just
get frustrated and never tell us that problems happen.

thanks,

greg k-h
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