linux-kernel - Re: [PATCH 1/1] Staging: hv: Move the mouse driver out of staging

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Date:	Sun, 13 Nov 2011 16:47:45 -0800
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Jiri Kosina <jkosina@...e.cz>
Cc:	KY Srinivasan <kys@...rosoft.com>,
	"gregkh@...e.de" <gregkh@...e.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
	"virtualization@...ts.osdl.org" <virtualization@...ts.osdl.org>,
	"ohering@...e.com" <ohering@...e.com>,
	"joe@...ches.com" <joe@...ches.com>
Subject: Re: [PATCH 1/1] Staging: hv: Move the mouse driver out of staging

On Sun, Nov 13, 2011 at 09:01:28PM +0100, Jiri Kosina wrote:
> On Sun, 6 Nov 2011, Dmitry Torokhov wrote:
> 
> > > I am not a hid expert; but all  hid low level drivers appear to do this.
> > > Initially, I was directly invoking hid_connect() directly and based on your
> > > Input, I chose to use hid_hw_start() which all other drivers are using.
> > 
> > Note that the users of hid_hw_start() actually are not low level
> > drivers, such as usbhid or bluetooth hidp, but higher-level drivers,
> > such as hid-wacom, hid-a4tech, etc. Since your driver is a low-level
> > driver (a provider so to speak) it should not call hid_hw_start() on its
> > own but rather wait for the hid code to do it.
> > 
> > Still, I am not a HID expert either so I'll defer to Jiri here.
> 
> Hi,
> 
> my understanding is that hv driver is actually a bit special in this 
> respect -- it's actually all-in-one both low-level and high-level driver. 
> I take it that there is not ever going to be a different high-level driver 
> using low-level hv transport (is that correct, KY?), so this might indeed 
> be an acceptable layout of the driver.
> 

I actually do not see anything of a high-level driver in hv-mouse. It is
a pure transport driver that channels everything through hid-input...

Thanks.

-- 
Dmitry
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