linux-kernel - Re: [HANG] Trouble with NEC-based USB adapter in PCMCIA slot on E7110

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Date:	Sun, 11 Aug 2013 10:51:05 +0200
From:	Thomas Richter <richter@....uni-stuttgart.de>
To:	Alan Stern <stern@...land.harvard.edu>
CC:	linux-kernel@...r.kernel.org
Subject: Re: [HANG] Trouble with NEC-based USB adapter in PCMCIA slot on E7110

On 11.08.2013 03:46, Alan Stern wrote:
> On Sat, 10 Aug 2013, Thomas Richter wrote:
>
>> Sorry, need to look further. I replaced ehci-pci from 2.6.31.14, and
>> yenta_socket as well. No changes were necessary. Also replaced ehci-hcd,
>
> Do you mean that you took the source code for ehci-hcd from the 2.6.31
> kernel, copied it into the source directory for the 2.6.32 kernel, and
> built it there?

Exactly that, yes. Two minor patches were necessary in ehci-hcd, but I 
doubt that this is the source of the problem (just one administration 
structure was pulled out in 2.6.32).

>> but that required two minor changes because in 2.6.32, apparently, one
>> hardware related structure was pulled out of the ehci structure.
>>
>> Still did not make any difference, still locks up.
>>
>> What's the next module up in the call chain I should be looking at?
>
> Have you tried comparing a usbmon trace from 2.6.31 with a comparable
> trace from 2.6.32?  I doubt there will be any important differences,
> but you never know until you try.

Not yet, good idea, thanks.

Thanks,
	Thomas


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