linux-kernel - Re: Error message from device_rename in drivers/base/core.c

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Date:	Wed, 8 Aug 2007 15:46:40 +0200
From:	"Kay Sievers" <kay.sievers@...y.org>
To:	"Larry Finger" <larry.finger@...inger.net>
Cc:	"Cornelia Huck" <cornelia.huck@...ibm.com>,
	"David Miller" <davem@...emloft.net>, linux-kernel@...r.kernel.org
Subject: Re: Error message from device_rename in drivers/base/core.c

On 8/8/07, Larry Finger <larry.finger@...inger.net> wrote:
> Cornelia Huck wrote:
> > On Tue, 07 Aug 2007 21:37:24 -0700 (PDT),
> > David Miller <davem@...emloft.net> wrote:
> >
> >> I think this check belongs in udev not in the kernel.  Thankfully
> >> this message at least tells us it is happening, please don't
> >> remove it.
> >
> > Hm, device_rename() could alternatively just return success if
> > dev->bus_id and new_name are the same.
>
> That is what my proposed patch did. One could argue that the test should come before the failure,
> not after, but the effect is the same.
>
> >> I'm pretty sure it's UDEV doing this, and it should not try to rename
> >> a netdevice to what it already is named.
> >
> > But it shouldn't cause an error either :)
>
> I agree with you, but you and David can fight it out. While finding out where to ask/complain about
> udev, I had a private communication with GregKH. He thinks that a patch to fix this has already been
> pushed through Linus. As Linville's wireless-dev tree is a little behind, I'm waiting to see if it
> gets fixed here by 2.6.23-rc3. If not, I'll talk to the udev/hotplug folks.

Hmm, I can not immediately see how udev could request the renaming to
the same name:

  /* look if we want to change the name of the netif */
  if (strcmp(udev->name, udev->dev->kernel) != 0) {
    ...
    retval = rename_netif(udev);
    ...
  }

What udev version is it and which distro and version?

Kay
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