linux-kernel - Re: 2.6.27-rc7-git1: usb-storage breakage with non-functional disk

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Date:	Tue, 8 Jul 2008 17:11:56 +0200 (CEST)
From:	"Indan Zupancic" <indan@....nu>
To:	"Alan Stern" <stern@...land.harvard.edu>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	"Matthew Dharm" <mdharm-usb@...-eyed-alien.net>,
	"USB development list" <linux-usb@...r.kernel.org>,
	"LKML" <linux-kernel@...r.kernel.org>, "Greg KH" <greg@...ah.com>,
	"linux-scsi" <linux-scsi@...r.kernel.org>,
	"Andrew Morton" <akpm@...ux-foundation.org>
Subject: Re: 2.6.27-rc7-git1: usb-storage breakage with non-functional disk

On Tue, July 8, 2008 16:11, Alan Stern wrote:
> On Tue, 8 Jul 2008, Indan Zupancic wrote:
>
>> On Tue, July 8, 2008 15:00, Indan Zupancic wrote:
>> > Any idea why my cardreader doesn't work in the first place though?
>>
>> In case it's useful, an usbmon dump can be found at
>> http://pastebin.org/49630
>> This is the log of plugging in the thing and unplugging it again after it
>> failed.
>> Corresponding dmesg output with USB and usb-storage debugging enabled at
>> http://pastebin.org/49631. This is on 2.6.26-rc9 with Alan's patch applied.
>
> The logs reveal only that this doesn't seem to be a software- or
> firmware-related problem.  And it probably isn't a problem in the cable
> either, which leaves only the reader or its USB interface.
>
> It might work better at full speed than at high speed (although you
> probably don't want to use it in a degraded mode).

It works if I disable USB 2.0 support in the BIOS, does that tell us
anything new? The thing is sold as a USB 2.0 device, does this just
confirm that it's a cheap device which is just lousy quality, or can
it be considered broken?

...

I tried it with my neighbour's computer and there it didn't work either,
so it's just broken hardware it seems.

Oh well, tested one patch today, so it wasn't totally useless.

Thanks for the help,

Indan


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