ACPICA: FADT: Remove extraneous warning for very large GPE registers
This change removes a size mismatch warning if the legacy
length field for a GPE register set is larger than the 64-bit
GAS structure can accomodate. GPE register sets can be larger
than the 255 bit limitation of the GAS structure. Linn Crosetto
(linn@hp.com).
Signed-off-by: Linn Crosetto <linn@hp.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/acpi/acpica/tbfadt.c b/drivers/acpi/acpica/tbfadt.c
index 74181bf..33b00d2 100644
--- a/drivers/acpi/acpica/tbfadt.c
+++ b/drivers/acpi/acpica/tbfadt.c
@@ -559,8 +559,12 @@
/*
* For each extended field, check for length mismatch between the
* legacy length field and the corresponding 64-bit X length field.
+ * Note: If the legacy length field is > 0xFF bits, ignore this
+ * check. (GPE registers can be larger than the 64-bit GAS structure
+ * can accomodate, 0xFF bits).
*/
if (address64->address &&
+ (ACPI_MUL_8(length) <= ACPI_UINT8_MAX) &&
(address64->bit_width != ACPI_MUL_8(length))) {
ACPI_BIOS_WARNING((AE_INFO,
"32/64X length mismatch in FADT/%s: %u/%u",