linux-kernel - RE: [PATCH 12/49] Staging: hv: storvsc: Add a DMI signature to support auto-loading

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Date:	Tue, 7 Jun 2011 22:19:06 +0000
From:	KY Srinivasan <kys@...rosoft.com>
To:	Greg KH <greg@...ah.com>
CC:	Christoph Hellwig <hch@...radead.org>,
	"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>,
	"Haiyang Zhang" <haiyangz@...rosoft.com>,
	"Abhishek Kane (Mindtree Consulting PVT LTD)" 
	<v-abkane@...rosoft.com>
Subject: RE: [PATCH 12/49] Staging: hv: storvsc: Add a DMI signature to
 support auto-loading



> -----Original Message-----
> From: Greg KH [mailto:greg@...ah.com]
> Sent: Tuesday, June 07, 2011 2:58 PM
> To: KY Srinivasan
> Cc: Christoph Hellwig; gregkh@...e.de; linux-kernel@...r.kernel.org;
> devel@...uxdriverproject.org; virtualization@...ts.osdl.org; Haiyang Zhang;
> Abhishek Kane (Mindtree Consulting PVT LTD)
> Subject: Re: [PATCH 12/49] Staging: hv: storvsc: Add a DMI signature to support
> auto-loading
> 
> On Tue, Jun 07, 2011 at 02:54:25PM +0000, KY Srinivasan wrote:
> >
> >
> > > -----Original Message-----
> > > From: Christoph Hellwig [mailto:hch@...radead.org]
> > > Sent: Monday, June 06, 2011 7:13 PM
> > > To: KY Srinivasan
> > > Cc: gregkh@...e.de; linux-kernel@...r.kernel.org;
> > > devel@...uxdriverproject.org; virtualization@...ts.osdl.org; Haiyang Zhang;
> > > Abhishek Kane (Mindtree Consulting PVT LTD)
> > > Subject: Re: [PATCH 12/49] Staging: hv: storvsc: Add a DMI signature to
> support
> > > auto-loading
> > >
> > > On Mon, Jun 06, 2011 at 03:49:36PM -0700, K. Y. Srinivasan wrote:
> > > > To support auto-loading the storvsc driver, add a DMI signature.
> > >
> > > The storvsc driver is not a DMI driver, but a vmbus driver.  As such it
> > > should have a vmbus table that is used for autoloading, not a dmi one.
> > >
> >
> > A while ago, Greg introduced DMI signatures to these drivers to support
> > auto-loading. This signature is not used for anything else. For some reason,
> > this storvsc driver was missing this signature. I added it again to only support
> > auto-loading.
> 
> Yes, that was there to solve the original problem of autoloading the
> driver.
> 
> But Christoph is correct here, the vmbus needs a way to autoload its own
> drivers based on the GUID signatures of the devices it finds on the
> hyperv bus.  So the correct thing to do in the long-run is to implement
> this (which is one of the things the bus needs to do before it can move
> out of staging).
> 
> I'll take this patch as-is for now though, as it does solve the
> immediate issue.

Thanks Greg. Can you give me some pointers here as to what needs to be
done here. Looking at the code for virtio, it looks like I would need to add stuff
to scripts/mod/file2alias.c as well as to include/linux/mod_devicetable.h. Will you
accept patches for these files to support an ID space for Hyper-V vmbus drivers.

Regards,

K. Y

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