[systemd-devel] [PATCH 2/2] udev: fix for devices without PCI

Kay Sievers kay at vrfy.org
Sun Mar 3 10:22:42 PST 2013

On Sun, Mar 3, 2013 at 7:10 PM, Rob Clark <robdclark at gmail.com> wrote:
> On Sun, Mar 3, 2013 at 1:06 PM, Kay Sievers <kay at vrfy.org> wrote:
>> On Sun, Mar 3, 2013 at 6:55 PM, Rob Clark <robdclark at gmail.com> wrote:
>>> On many arm embedded SoC's (phones, tablets, etc), there is no PCI bus.
>>> So it is not an error if names_pci() fails to find a parent PCI device.
>> As the comment in the code lines above states, all these names work on
>> for PCI based setups.
>> Other buses and architectures would need proper code to handle them,
>> not just skip over the pci prefix. We cannot do that.
> Of course, if you have a better idea in mind, I am all-ears.  I'm not
> a systemd/udev expert, so certainly don't claim that it is the best
> fix.  It would be nice for this to work somehow properly on the
> various PCI-less systems out there.

It depends on the bus type used for the parent device(s), we would
need to compose a stable and predictable name from the properties of
the parent device(s). In most cases it's probably a simple "platform"
bus hack, which we will see.

What does:
  ls -l /sys/class/net
print on these systems?

There are only a few chars left to use for network names, so just
using the platform name would probably not work in some cases. Not
sure if someone has an idea, what to do here ...


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