Hello Uffe,
I most likely will not be able to confirm that the problem is still present in mmc-next for you, I do not have hardware available to do so. Looking at the code this bug does seem to be present as ext_csd.part_config is not updated in the ioctl, related to 2) in your summary. There could be other places similar to the scenario I've reported for other partsof ext csd, but I'm not familiar enough with either mmc specification or the code .
As for 1) cannot confirm as I've never witnessed this issue.
> I am not sure how to go with this, especially since you are referring to an old
> kernel, 4.1.15. Can you confirm that the problem is still present in the my
> next branch of my mmc git tree? That would be more relevant information to
> start with.
>
> So to move forward, I decide to investigate the problem a bit. Here's my
> summary:
>
> 1) There are problems regarding switching between partitions in general,
> because the (e)MMC partitions isn't correctly set up.
> 2) The are problems related to when userspace utilizes the mmc back-door
> (mmc-ioctl) to change ext csd, because the mmc core don't get informed
> about these updates. For example, the mmc core may then take wrong
> decisions in the suspend/resume sequence.
>
> It would really be nice to fix these problems, however I need good quality
> patches, based on my mmc next branch confirming to fix problems.
>
I can submit a patch for the bug I've witnessed if you'd like, which may end up being a series of similar fixes from others?
Brandon
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