linux-kernel - RE: [PATCH v2] Add driver to force WMI Thunderbolt controller power status

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Message-ID: <339f06ce8efd42409bf5f91dfd064e7a@ausx13mpc120.AMER.DELL.COM>
Date:   Fri, 8 Sep 2017 15:15:10 +0000
From:   <Mario.Limonciello@...l.com>
To:     <mika.westerberg@...ux.intel.com>
CC:     <dvhart@...radead.org>, <linux-kernel@...r.kernel.org>,
        <platform-driver-x86@...r.kernel.org>, <hughsient@...il.com>,
        <yehezkelshb@...il.com>
Subject: RE: [PATCH v2] Add driver to force WMI Thunderbolt controller power
 status

> -----Original Message-----
> From: Mika Westerberg [mailto:mika.westerberg@...ux.intel.com]
> Sent: Friday, September 8, 2017 3:07 AM
> To: Limonciello, Mario <Mario_Limonciello@...l.com>
> Cc: dvhart@...radead.org; LKML <linux-kernel@...r.kernel.org>; platform-driver-
> x86@...r.kernel.org; Richard Hughes <hughsient@...il.com>; Yehezkel Bernat
> <yehezkelshb@...il.com>
> Subject: Re: [PATCH v2] Add driver to force WMI Thunderbolt controller power
> status
> 
> On Thu, Sep 07, 2017 at 01:47:22PM -0500, Mario Limonciello wrote:
> 
> I have a small comment which you might want to consider.
> 
> > +static int intel_wmi_thunderbolt_probe(struct wmi_device *wdev)
> > +{
> > +	return sysfs_create_group(&wdev->dev.kobj, &tbt_attribute_group);
> > +}
> > +
> > +static int intel_wmi_thunderbolt_remove(struct wmi_device *wdev)
> > +{
> > +	sysfs_remove_group(&wdev->dev.kobj, &tbt_attribute_group);
> > +	return 0;
> > +}
> 
> In order to notify userspace about this, what if you send KOBJ_CHANGE
> for the wdev when you add/remove this attribute?

Sure, makes sense to me.   I'll send a follow up patch.