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Date:   Mon, 11 Jan 2021 16:44:21 -0800 (PST)
From:   Hugh Dickins <>
To:     Saravana Kannan <>
cc:     Hugh Dickins <>,
        "Rafael J. Wysocki" <>,
        Thierry Reding <>,
        Jonathan Hunter <>,
        Greg Kroah-Hartman <>,
        Vincent Huang <>,
        "Jason A. Donenfeld" <>,
        Andrew Duggan <>,
        Lucas Stach <>,
        Linux Kernel Mailing List <>,
        Linux PM <>
Subject: Re: 5.11-rc device reordering breaks ThinkPad rmi4 suspend

On Mon, 11 Jan 2021, Saravana Kannan wrote:
> On Mon, Jan 11, 2021 at 3:42 PM Hugh Dickins <> wrote:
> > On Mon, 11 Jan 2021, Saravana Kannan wrote:
> > >
> > > I happen to have an X1 Carbon (different gen though) lying around and
> > > I poked at its /sys folders. None of the devices in the rmi4_smbus are
> > > considered the grandchildren of the i2c device. I think the real
> > > problem is rmi_register_transport_device() [1] not setting up the
> > > parent for any of the new devices it's adding.
> > >
> > > Hugh, can you try this patch?
> >
> > Just tried, but no, this patch does not help; but I bet
> > you're along the right lines, and something as simple will do it.
> Did you see this patch change the organization of devices under /sys/devices/?
> The rmi* devices need to be under one of the i2c devices after this
> patch. Is that not the case? Or is that the case, but you are still
> seeing suspend/resume issues?

Now that I look, yes, that patch has moved the directory

But I still see the same suspend issues despite that.


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