linux-kernel - Re: [PATCH v10 4/7] PCI: add SR-IOV API for Physical Function driver

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Date:	Mon, 9 Mar 2009 12:39:01 -0700
From:	Greg KH <greg@...ah.com>
To:	Yu Zhao <yu.zhao@...el.com>
Cc:	Matthew Wilcox <matthew@....cx>,
	"jbarnes@...tuousgeek.org" <jbarnes@...tuousgeek.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Randy.Dunlap" <rdunlap@...otime.net>
Subject: Re: [PATCH v10 4/7] PCI: add SR-IOV API for Physical Function
	driver

On Mon, Mar 09, 2009 at 04:25:05PM +0800, Yu Zhao wrote:
> > > +	pci_device_add(virtfn, virtfn->bus);
> > 
> > Greg is probably going to ding you here for adding the device, then
> > creating the symlinks.  I believe it's now best practice to create the
> > symlinks first, so there's no window where userspace can get confused.
> 
> Yes, but unfortunately we can't create links before adding a device.
> I double checked device_add(), there is no place for those links to be
> created before it sends uevent. So for now, we have to trigger another
> uevent for those links.

What exactly are you trying to do with a symlink here that you need to
do it this way?  I vaguely remember you mentioning this in the past, but
I thought you had dropped the symlinks after our conversation about this
very problem.

thanks,

greg k-h
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