ACPI: HED: Refine guarding against adding a second instance

There can be only one ACPI hardware event device (HED) in use at a time,
so acpi_hed_probe() uses static variable hed_handle for guarding against
adding a second HED instance, but there is no reason for that variable
to hold an ACPI handle, so change it to a bool one.

While at it also set that variable at the end of acpi_hed_probe() to
avouid the need to clear it when installing the ACPI notify handler
fails.

Note that ACPI devices are enumerated sequentially, so there's no need
for additional locking around the accesses to that variable.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/2042970.PYKUYFuaPT@rafael.j.wysocki

0 files changed, 0 insertions, 0 deletions