diff options
| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2024-08-12 15:16:21 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2024-08-13 13:45:14 +0200 |
| commit | 71bf41b8e913ec9fc91f0d39ab8fb320229ec604 (patch) | |
| tree | 2bc947b17c669cc1f4a8bebf400634bb0424ecf8 /certs | |
| parent | cdf65d73e001fde600b18d7e45afadf559425ce5 (diff) | |
ACPI: EC: Evaluate _REG outside the EC scope more carefully
Commit 60fa6ae6e6d0 ("ACPI: EC: Install address space handler at the
namespace root") caused _REG methods for EC operation regions outside
the EC device scope to be evaluated which on some systems leads to the
evaluation of _REG methods in the scopes of device objects representing
devices that are not present and not functional according to the _STA
return values. Some of those device objects represent EC "alternatives"
and if _REG is evaluated for their operation regions, the platform
firmware may be confused and the platform may start to behave
incorrectly.
To avoid this problem, only evaluate _REG for EC operation regions
located in the scopes of device objects representing known-to-be-present
devices.
For this purpose, partially revert commit 60fa6ae6e6d0 and trigger the
evaluation of _REG for EC operation regions from acpi_bus_attach() for
the known-valid devices.
Fixes: 60fa6ae6e6d0 ("ACPI: EC: Install address space handler at the namespace root")
Link: https://lore.kernel.org/linux-acpi/1f76b7e2-1928-4598-8037-28a1785c2d13@redhat.com
Link: https://bugzilla.redhat.com/show_bug.cgi?id=2298938
Link: https://bugzilla.redhat.com/show_bug.cgi?id=2302253
Reported-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Cc: All applicable <stable@vger.kernel.org>
Link: https://patch.msgid.link/23612351.6Emhk5qWAg@rjwysocki.net
Diffstat (limited to 'certs')
0 files changed, 0 insertions, 0 deletions