Dear stable kernel team,
In stable kernel 4.19.2, the following upstream commit was included:
commit 4abb951b73ff0a8a979113ef185651aa3c8da19b Author: Erik Schmauss Date: Wed Oct 17 14:09:35 2018 -0700
ACPICA: AML interpreter: add region addresses in global list during initialization
This commit was tagged with:
Link: https://bugzilla.kernel.org/show_bug.cgi?id=200011 Tested-by: Jean-Marc Lenoir Cc: All applicable stable@vger.kernel.org
making it sound like it was fixing an actual bug. This is not the case. The commit fixes a side issue discovered while investigating bug #200011. It does NOT fix bug #200011 itself (as explicitly reported by Jean-Marc at https://bugzilla.kernel.org/show_bug.cgi?id=200011#c65 ).
It does however cause regressions, despite what the commit message says. See:
https://bugzilla.kernel.org/show_bug.cgi?id=201721
and I expect more similar regressions, as ACPI resource conflicts are very frequent.
This commit was not stable material to start with. It is intrusive, presents a risk of side effects, and does not solve an actual bug that is bothering users.
Please revert this commit from future stable kernels on all affected branches (I think only 4.18.19 and 4.19.2 are affected at the moment, but maybe other affected releases are in the works already).
Thanks,