linux-kernel - Re: [PATCH 1/1] Add virtio-input driver.

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Message-ID: <1426845273.32097.39.camel@nilsson.home.kraxel.org>
Date:	Fri, 20 Mar 2015 10:54:33 +0100
From:	Gerd Hoffmann <kraxel@...hat.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	David Herrmann <dh.herrmann@...il.com>,
	virtio-dev@...ts.oasis-open.org,
	virtualization@...ts.linux-foundation.org, mst@...hat.com,
	Rusty Russell <rusty@...tcorp.com.au>,
	open list <linux-kernel@...r.kernel.org>,
	"open list:ABI/API" <linux-api@...r.kernel.org>
Subject: Re: [PATCH 1/1] Add virtio-input driver.

  Hi,

> > > +static ssize_t serial_show(struct device *dev,
> > > +                          struct device_attribute *attr, char *buf)
> > > +{
> > > +       struct input_dev *idev = to_input_dev(dev);
> > > +       struct virtio_input *vi = input_get_drvdata(idev);
> > > +       return sprintf(buf, "%s\n", vi->serial);
> > > +}
> > > +static DEVICE_ATTR_RO(serial);
> 
> What is serial? Serial number?

Yes.  You can (optionally) configure a serial number on the host side,
and if that is the case it'll show up here.

> > Can you set vi->idev->uniq to the virtio-bus path?
> 
> No, uniq can't be phys as phys is unique within the system while uniq is
> like serial number or UUID and should never repeat.

Ok, so I guess I should just fill uniq with serial (if present).

cheers,
  Gerd


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