linux-kernel - Re: [linux-usb-devel] Error -71 on device descriptor read/all

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Message-ID: <Pine.LNX.4.64.0706191134160.12843@utopia.booyaka.com>
Date:	Tue, 19 Jun 2007 11:36:53 -0600 (MDT)
From:	Paul Walmsley <paul@...yaka.com>
To:	Oliver Neukum <oliver@...kum.org>
cc:	linux-usb-devel@...ts.sourceforge.net,
	Chuck Ebbert <cebbert@...hat.com>,
	"Renato S. Yamane" <renatoyamane@...dic.com.br>,
	linux-kernel@...r.kernel.org
Subject: Re: [linux-usb-devel] Error -71 on device descriptor read/all

On Tue, 19 Jun 2007, Oliver Neukum wrote:

> Am Dienstag, 19. Juni 2007 schrieb Chuck Ebbert:
>
>> Try disabling CONFIG_USB_SUSPEND
>>
>> [usb developers: what are the drawbacks of doing this?]
>
> Increased power consumption.

speaking of CONFIG_USB_SUSPEND, I've encountered at least one device -- a 
Canon EOS 5D camera -- that, after the bus suspends, must be powercycled 
in order to return the camera's interrupt endpoints to a functional state. 
How are these types of problems handled, currently?  Is this something for 
a blacklist?


- Paul
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