[net] Revert "net: core: maybe return -EEXIST in __dev_alloc_name"
Johannes Berg
johannes at sipsolutions.net
Wed Dec 20 03:15:06 AEDT 2017
Hi,
> This revert seems to have broken networking on one of my powerpc
> machines, according to git bisect.
Fun!
TBH, I only looked at the immediate problem we ran into, and reverted
what was causing it. I don't think we saw the follow-up problem you're
seeing.
> The symptom is DHCP fails and I don't get a link, I didn't dig any
> further than that. I can if it's helpful.
>
> I think the problem is that 87c320e51519 ("net: core: dev_get_valid_name
> is now the same as dev_alloc_name_ns") only makes sense while
> d6f295e9def0 remains in the tree.
>
> ie. before the entire series, dev_get_valid_name() would return EEXIST,
> and that was retained when 87c320e51519 was merged, but now that
> d6f295e9def0 has been reverted dev_get_valid_name() is returning ENFILE.
>
> I can get the network up again if I also revert 87c320e51519 ("net:
> core: dev_get_valid_name is now the same as dev_alloc_name_ns"), or with
> the gross patch below.
Makes sense. I guess that should be reverted too then, or even your
"gross" patch applied.
johannes
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