linux-kernel - Re: [PATCH 019/117] Staging: hv: vmbus: Cleanup vmbus

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Date:	Tue, 23 Aug 2011 20:00:25 -0700
From:	Greg KH <greg@...ah.com>
To:	KY Srinivasan <kys@...rosoft.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>,
	Haiyang Zhang <haiyangz@...rosoft.com>
Subject: Re: [PATCH 019/117] Staging: hv: vmbus: Cleanup vmbus_uevent() code

On Wed, Aug 24, 2011 at 12:38:09AM +0000, KY Srinivasan wrote:
> 
> 
> > -----Original Message-----
> > From: Greg KH [mailto:greg@...ah.com]
> > Sent: Tuesday, August 23, 2011 6:50 PM
> > To: KY Srinivasan
> > Cc: gregkh@...e.de; linux-kernel@...r.kernel.org;
> > devel@...uxdriverproject.org; virtualization@...ts.osdl.org; Haiyang Zhang
> > Subject: Re: [PATCH 019/117] Staging: hv: vmbus: Cleanup vmbus_uevent() code
> > 
> > On Fri, Jul 15, 2011 at 10:46:07AM -0700, K. Y. Srinivasan wrote:
> > > Now generate appropriate uevent based on the modalias string. As part of this,
> > > cleanup the existing uevent code.
> > 
> > Note, you just change the user api here, did you have tools that relied
> > on the old format?  If so, they just broke :(
> 
> Prior to this, I don't think autoloading worked the way it should for these
> modules. 

It didn't?  How did the mouse driver get autoloaded then, through the
pci/dmi tables?

> > > +	for (i = 0; i < (sizeof(struct hv_vmbus_device_id) * 2); i += 2)
> > > +		sprintf(&alias_name[i], "%02x", dev->dev_type.b[i/2]);
> > 
> > Don't we have a type for printing out a uuid already?
> 
> I did not see one; could you point me to the right place.
> > 
> > And what's with the jumping by 2 yet dividing?  What am I missing here?
> 
> Each byte of the uuid is represented by 2 bytes in the string; thus the magic with 2.

Ok, wierd, but it makes sense, thanks.

greg k-h
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