linux-kernel - Re: [PATCH 4.4 009/115] Bluetooth: btusb: driver to enable the usb-wakeup feature

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Date:   Sat, 23 Dec 2017 17:14:28 +0100
From:   "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
To:     "Ghorai, Sukumar" <sukumar.ghorai@...el.com>
Cc:     Brian Norris <briannorris@...omium.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Matthias Kaehlcke <mka@...omium.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "Bag, Amit K" <amit.k.bag@...el.com>,
        Oliver Neukum <oneukum@...e.com>,
        Marcel Holtmann <marcel@...tmann.org>,
        Todd Broch <tbroch@...omium.org>,
        Rajat Jain <rajatja@...omium.org>,
        Miao Chou <mcchou@...omium.org>,
        "Rao Pv, Sadashiva" <sadashiva.rao.pv@...el.com>
Subject: Re: [PATCH 4.4 009/115] Bluetooth: btusb: driver to enable the
 usb-wakeup feature

On Sat, Dec 23, 2017 at 03:53:57PM +0000, Ghorai, Sukumar wrote:
> >> > included in 4.14-rc1, so something needs to be done in Linus's tree
> >> > to resolve this issue, otherwise people will hit this as a
> >> > regression when moving to 4.14 or newer.
> >>
> >> Well, I wouldn't object to reverting it in Linus' tree too, since
> >> AFAIK, this is something that can be configured by user-space policy,
> >> no? And that way, no user space is surprised by the sudden additional
> >> requirements on managing bluetooth wakeup.
> Wakeup from Bluetooth will be observed as long as USB wakeup is configured from 
> user space or kernel space or connected to any Bluetooth HID devices. 
> And we don't want to support the wakeup from BT HID devide.
> The solution looks like disable Bluetooth in S3 entry?
> Looks we are trying to hide the other problems in a system, and reverting this patch.
> 
> >
> >I agree, please work with the bluetooth developers to make this happen.
> >They seem to be ignoring patches right now, so you might have to kick them a few
> >times :(
> Do you suggest submitter to send the revert request to 4.12 and 4.14 kernel?

4.12 is long end-of-life, I don't know what you expect to happen there.

4.14 is already released, this needs to be done for 4.15 first, right?

thanks,

greg k-h