ACPICA: actypes.h: Expand the ACPI_ACCESS_ definitions
authorMark Langsdorf <mlangsdo@redhat.com>
Wed, 22 Dec 2021 15:57:34 +0000 (16:57 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 27 Jan 2022 09:54:18 +0000 (10:54 +0100)
commitfcfd8282c5d2fa335455a33c18d4426c58b80f72
treeabf1493935960655ce97dcdc0b63ca0868203253
parente3a51d6c90a8f909009342b0bb3a98f316c003b1
ACPICA: actypes.h: Expand the ACPI_ACCESS_ definitions

[ Upstream commit f81bdeaf816142e0729eea0cc84c395ec9673151 ]

ACPICA commit bc02c76d518135531483dfc276ed28b7ee632ce1

The current ACPI_ACCESS_*_WIDTH defines do not provide a way to
test that size is small enough to not cause an overflow when
applied to a 32-bit integer.

Rather than adding more magic numbers, add ACPI_ACCESS_*_SHIFT,
ACPI_ACCESS_*_MAX, and ACPI_ACCESS_*_DEFAULT #defines and
redefine ACPI_ACCESS_*_WIDTH in terms of the new #defines.

This was inititally reported on Linux where a size of 102 in
ACPI_ACCESS_BIT_WIDTH caused an overflow error in the SPCR
initialization code.

Link: https://github.com/acpica/acpica/commit/bc02c76d
Signed-off-by: Mark Langsdorf <mlangsdo@redhat.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
include/acpi/actypes.h