netdev - Re: [PATCH v16 11/22] cxl: Define a driver interface for HPA free space enumeration

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Message-ID: <682f899ba6998_3e70100ee@dwillia2-xfh.jf.intel.com.notmuch>
Date: Thu, 22 May 2025 13:31:23 -0700
From: Dan Williams <dan.j.williams@...el.com>
To: Alejandro Lucero Palau <alucerop@....com>, Dan Williams
	<dan.j.williams@...el.com>, <alejandro.lucero-palau@....com>,
	<linux-cxl@...r.kernel.org>, <netdev@...r.kernel.org>, <edward.cree@....com>,
	<davem@...emloft.net>, <kuba@...nel.org>, <pabeni@...hat.com>,
	<edumazet@...gle.com>, <dave.jiang@...el.com>
CC: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Subject: Re: [PATCH v16 11/22] cxl: Define a driver interface for HPA free
 space enumeration

Alejandro Lucero Palau wrote:
[..]
> > The reference does not stop the root decoder from being unregistered and
> > it is clearly broken to allow it to be unregistered while drivers have
> > pending allocations.
> 
> 
> I agree all this requires to address those problems, hopefully in the 
> short-mid term, meaning follow-ups of this patchset.

When I made the comment above it was before realizing that v16 dropped
the cxl_acquire_endpoint() mechanism. There are just too many
memory-safety bugs in this patchset around CXL topology setup/teardown.
I am not seeing a way to address all the problems solely with
follow-ups.