Please use Reply-To-All so that your messages get sent to the mailing list as well as to me. On Tue, 19 Jan 2016, MONDON Daniel wrote: > >> Hello, > >> > >> Under Open embedded (Angstrom 05-2012) with kernel 3.2.30, > > > >That's an awfully old kernel. > > Yes but I can't change it with more than 5000 machine all over the world ... > > > >> 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. > I've got a few kernel logs, but nothing about that. > I need to understand what I can do and looking for. > The reason off my question. What is the output from "dmesg"? > >> 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. > I will have a look! > And search in what files I can add debug logs. USB resets are handled by usb_reset_device() in drivers/usb/core/hub.c. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
