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

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Message-ID: <6E21E5352C11B742B20C142EB499E0481AA6C1D4@TK5EX14MBXC128.redmond.corp.microsoft.com>
Date:	Mon, 14 Nov 2011 02:40:30 +0000
From:	KY Srinivasan <kys@...rosoft.com>
To:	Jiri Kosina <jkosina@...e.cz>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>
CC:	"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



> -----Original Message-----
> From: Jiri Kosina [mailto:jkosina@...e.cz]
> Sent: Sunday, November 13, 2011 3:01 PM
> To: Dmitry Torokhov
> Cc: KY Srinivasan; gregkh@...e.de; linux-kernel@...r.kernel.org;
> devel@...uxdriverproject.org; virtualization@...ts.osdl.org; ohering@...e.com;
> joe@...ches.com
> Subject: Re: [PATCH 1/1] Staging: hv: Move the mouse driver out of staging
> 
> 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.

You are right Jiri. While this is a low level transport driver, there will never be a another
higher level driver using this transport.

Regards,

K. Y
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