eth1394 has problems with persistent-net with kernel 2.6.21

eth1394 has problems with persistent-net with kernel 2.6.21

[Matthias Schwarzott]

Hi!

As eth1394 had some "small" change in Kernel 2.6.21, it now has no 
parent-device, and thus no DRIVERS="?*". So the generated rule for 
persistent-net does no longer apply, and we get the known sympthoms of 
devices called "eth?_rename" and 30sec timeout at boot.


The relevant change to that driver:

--- linux-2.6.20/drivers/ieee1394/eth1394.c      2007-02-21 18:17:20.000000000 
+0100
+++ linux-2.6.21/drivers/ieee1394/eth1394.c      2007-04-27 @@ -585,7 +584,10 
@@
         }

        SET_MODULE_OWNER(dev);
+#if 0
+       /* FIXME - Is this the correct parent device anyway? */
        SET_NETDEV_DEV(dev, &host->device);
+#endif

        priv = netdev_priv(dev);

Matthias
-- 
Matthias Schwarzott (zzam)

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Re: eth1394 has problems with persistent-net with kernel 2.6.21

[Marco d'Itri]

On May 02, Matthias Schwarzott <zzam@gentoo.org> wrote:

> As eth1394 had some "small" change in Kernel 2.6.21, it now has no 
> parent-device, and thus no DRIVERS="?*". So the generated rule for 
> persistent-net does no longer apply, and we get the known sympthoms of 
> devices called "eth?_rename" and 30sec timeout at boot.
Let's just say that this sucks.

-- 
ciao,
Marco

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Re: eth1394 has problems with persistent-net with kernel 2.6.21

[Matthias Schwarzott]

On Mittwoch, 2. Mai 2007, Marco d'Itri wrote:
> On May 02, Matthias Schwarzott <zzam@gentoo.org> wrote:
> > As eth1394 had some "small" change in Kernel 2.6.21, it now has no
> > parent-device, and thus no DRIVERS="?*". So the generated rule for
> > persistent-net does no longer apply, and we get the known sympthoms of
> > devices called "eth?_rename" and 30sec timeout at boot.
>
> Let's just say that this sucks.
Full ack, eth1394 should not be autoloaded! Perhaps we add it to the modules 
blacklist for next gentoo udev ebuild. But well, this is no solution for 
people using it really. Should we in this case remove the DRIVERS="?*" ?

Matthias

-- 
Matthias Schwarzott (zzam)

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Re: eth1394 has problems with persistent-net with kernel 2.6.21

[Marco d'Itri]

On May 02, Matthias Schwarzott <zzam@gentoo.org> wrote:

> Full ack, eth1394 should not be autoloaded! Perhaps we add it to the modules 
> blacklist for next gentoo udev ebuild.
I do not consider this to be a valid solution.

> But well, this is no solution for 
> people using it really. Should we in this case remove the DRIVERS="?*" ?
No, because this will breaks many more cases (at least VLANs and some
wireless drivers IIRC).

-- 
ciao,
Marco

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Re: eth1394 has problems with persistent-net with kernel 2.6.21

[Olivier Blin]

Matthias Schwarzott <zzam@gentoo.org> writes:

> On Mittwoch, 2. Mai 2007, Marco d'Itri wrote:
>> On May 02, Matthias Schwarzott <zzam@gentoo.org> wrote:
>> > As eth1394 had some "small" change in Kernel 2.6.21, it now has no
>> > parent-device, and thus no DRIVERS="?*". So the generated rule for
>> > persistent-net does no longer apply, and we get the known sympthoms of
>> > devices called "eth?_rename" and 30sec timeout at boot.
>>
>> Let's just say that this sucks.
> Full ack, eth1394 should not be autoloaded! Perhaps we add it to the modules 
> blacklist for next gentoo udev ebuild.

There should be not need for that, since eth1394 won't be autoloaded
anymore at controller initialization in future kernel releases (and
it's already this way in -mm kernel):
http://lkml.org/lkml/2007/4/29/361

-- 
Olivier Blin - Mandriva

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Re: eth1394 has problems with persistent-net with kernel 2.6.21

[Matthias Schwarzott]

On Mittwoch, 2. Mai 2007, Marco d'Itri wrote:
> On May 02, Matthias Schwarzott <zzam@gentoo.org> wrote:
> > But well, this is no solution for
> > people using it really. Should we in this case remove the DRIVERS="?*" ?
>
> No, because this will breaks many more cases (at least VLANs and some
> wireless drivers IIRC).

I just mean removing it in this special case, for ieee1394 devices.
Not for all rules.

Matthias
-- 
Matthias Schwarzott (zzam)

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Re: eth1394 has problems with persistent-net with kernel 2.6.21

[Marco d'Itri]

On May 02, Matthias Schwarzott <zzam@gentoo.org> wrote:

> I just mean removing it in this special case, for ieee1394 devices.
> Not for all rules.
This can be done, but the real problem is automatically updating the
existing rules files on upgrades.

-- 
ciao,
Marco

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Re: eth1394 has problems with persistent-net with kernel 2.6.21

[Matthias Schwarzott]

On Mittwoch, 2. Mai 2007, Matthias Schwarzott wrote:
> Hi!
>
> As eth1394 had some "small" change in Kernel 2.6.21, it now has no
> parent-device, and thus no DRIVERS="?*". So the generated rule for
> persistent-net does no longer apply, and we get the known sympthoms of
> devices called "eth?_rename" and 30sec timeout at boot.
>
This bugzilla-entry tracks that problem:
http://bugs.gentoo.org/show_bug.cgi?id\x177199

Matthias
-- 
Matthias Schwarzott (zzam)

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