Re: USB serial regression 2.6.31.1 -> 2.6.31.2

[Benjamin Herrenschmidt]

On Sat, 2009-10-10 at 09:38 +0200, Josua Dietze wrote:
> Benjamin Herrenschmidt schrieb:
> 
> 
> > The symptom is that the USB modem just disconnects/reconnects in a loop.
> > The log looks like what I pasted below when plugging the device (and
> > leaving it in, the disconnects don't correspond to the device being
> > removed).
> 
> 
> This is one of the mode switching devices. It is switched to modem 
> mode by "usb_stor_huawei_e220_init".
> 
> Something keeps resetting it to initial mode. It might be a 
> powersave/suspend issue.

suspend is a good candidate yeah, autosuspend might be causing something
like that, I'll see what I can find. I didn't spot an obvious change to
the USB suspend policy between those two kernels, but it could be
trigged by one of the numerous changes that went into usb-serial.

Cheers,
Ben.

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