linux-kernel - Re: [PATCH] virtio: make PCI devices take a virtio

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Message-ID: <493978FC.7000502@us.ibm.com>
Date:	Fri, 05 Dec 2008 12:54:52 -0600
From:	Anthony Liguori <aliguori@...ibm.com>
To:	Mark McLoughlin <markmc@...hat.com>
CC:	Jiri Slaby <jirislaby@...il.com>, Michael Tokarev <mjt@....msk.ru>,
	Rusty Russell <rusty@...tcorp.com.au>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	kvm <kvm@...r.kernel.org>
Subject: Re: [PATCH] virtio: make PCI devices take a virtio_pci module ref

Mark McLoughlin wrote:
> On Fri, 2008-12-05 at 09:43 -0600, Anthony Liguori wrote:
>   
>> Mark McLoughlin wrote:
>>     
>>> On Fri, 2008-12-05 at 14:17 +0100, Jiri Slaby wrote:
>>>   
>>> +static void virtio_pci_release_dev(struct device *dev)
>>> +{
>>> +}
>>> +
>>>  /* A PCI device has it's own struct device and so does a virtio device so
>>>   * we create a place for the virtio devices to show up in sysfs.  I think it
>>>   * would make more sense for virtio to not insist on having it's own device. */
>>>  static struct device virtio_pci_root = {
>>>  	.parent		= NULL,
>>>  	.bus_id		= "virtio-pci",
>>> +	.release	= virtio_pci_release_dev,
>>>  };
>>>   
>>>       
>> Actually, we should be able to delete this virtio_pci_root entirely.  
>> The device is a dummy one anyway.
>>     
>
> Care to recall why it was added initially and what's changed?
>
> One side effect of removing it is that each device appears on its own
> in /sys/devices rather than neatly under /sys/devices/virtio-pci.
>   

Basically, to get the neater sysfs hierarchy.  But it seems that this 
requires Evil Things so I'm inclined to say it's not worth it.

> (And one side effect of that is that the aforementioned Fedora mkinitrd
> kludge stops working which would make me sad :-)
>   

Yeah, that would be unfortunate.  Can the kludge be done differently?

Regards,

Anthony Liguori

> Cheers,
> mark.
>
>   

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