Re: RESET USB : error management

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On Fri, 15 Jan 2016, MONDON Daniel wrote:

> Hello,
> 
> Under Open embedded (Angstrom 05-2012) with kernel 3.2.30,

That's an awfully old kernel.

> I've got USB resets (on less than 1% machines).
> 
> Looking for the root cause (first hardware with intel combo lan 9514 susceptibility ...) ...
> 
> Does the kernel may generate the reset? The HUB ?
> And what can be the reason?
> (Data integrity, number of retry, ...?)

All of those are possibilities.  Without any kernel logs or any other 
information, it's impossible to give a better answer.

> More: I would like to know where I can find the USB error management documentation.

I'm not aware of any such documentation, other than the USB-2.0 
specification available from www.usb.org.

Alan Stern

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