[PATCH resend] ubi: attach: do not return -EINVAL if the mtd->numeraseregions is 1

[Artem Bityutskiy]

On Fri, 2014-02-14 at 17:11 +0800, Huang Shijie wrote:
> But if we do not have any _slave_ partitions, we will only have one
> master partition.
> and the numeraseregions is kept. this is the case i meet.

Why you prefer to change UBI instead of changing MTD so that master
partitions with no slave partitions would have numeraseregions=0.

And frankly, I did not clearly understand your answer.

And what erase regions have to do with master/slave?

Correct me if I am wrong below.

The erase region concept belongs to the flash chip. Some chips have
special regions, for some special purposes, and these, typically small,
regions have a bit different geometry.

Master/slave is a purely software concept. I never clearly understood
the model, but this is something related to partitions. We have a master
MTD device representing the entire chip, and slave MTD devices
representing partitions.

In your explanation you mix these 2 unrelated concepts, and I do not
understand why.

Yes, I could go and dig the code, but I prefer the patch submitter to
educate me instead, and demonstrate the depth of his understanding of
the subject :=) Sorry, I am lazy :-)

-- 
Best Regards,
Artem Bityutskiy