Re: [PATCH] usb:hub set hub->change_bits when over-current happens

[Greg KH]

On Tue, Jan 07, 2014 at 11:35:50AM +0800, æå wrote:
> On Tue, Jan 7, 2014 at 10:40 AM, Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> > On Tue, Jan 07, 2014 at 10:33:14AM +0800, æå wrote:
> >> set hub->change_bits when we plug in a device which causes
> >> over-current condition, so that hub_events() will check it.
> >
> > Why?
> >
> > What does this solve?  Is this a bug with existing devices that needs to
> > be backported to older kernels?
> >
> > thanks,
> >
> > greg k-h
> 
> This is something that we found when we are doing compliance test with xHCI.
> If we enable CONFIG_USB_SUSPEND, and plug in a bad device which causes
> over-current condition to the root port, the hub->change_bits will not
> be set in current code in the function of hub_activate.

Now that's something that should go in the changelog, don't you think?

thanks,

greg k-h
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