[PATCH 7/7] CXL: Unmap MMIO regions when detaching a context

[Michael Ellerman]

On Mon, 2014-12-15 at 14:32 +1100, Ian Munsie wrote:
> Excerpts from Ian Munsie's message of 2014-12-08 19:18:01 +1100:
> > From: Ian Munsie <imunsie at au1.ibm.com>
> > 
> > If we need to force detach a context (e.g. due to EEH or simply force
> > unbinding the driver) we should prevent the userspace contexts from
> > being able to access the Problem State Area MMIO region further, which
> > they may have mapped with mmap().
> > 
> > This patch unmaps any mapped MMIO regions when detaching a userspace
> > context.
> 
> Might want to drop this one for now - Philippe found that it sometimes
> causes an issue when multiple contexts are using the afu. Seems that
> unmap_mapping_range() unmapped a bit more than I expected.

Sorry, it's already in next.

https://git.kernel.org/cgit/linux/kernel/git/mpe/linux.git/commit/?h=next&id=b123429e6a9e8d03aacf888d23262835f0081448

Send me a revert or a fixup.

cheers