ACPICA: FADT: Fix extraneous length mismatch warning

Incorrect register length mismatch between the 32 and 64 bit
registers in some cases. Code was was checking the wrong pointer
for non-zero, should be looking at the address within the GAS
structure.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/acpi/acpica/tbfadt.c b/drivers/acpi/acpica/tbfadt.c
index af8fbe12d8b7..ff89cfee0e7e 100644
--- a/drivers/acpi/acpica/tbfadt.c
+++ b/drivers/acpi/acpica/tbfadt.c
@@ -491,7 +491,8 @@ static void acpi_tb_validate_fadt(void)
                  * For each extended field, check for length mismatch between the
                  * legacy length field and the corresponding 64-bit X length field.
                  */
-                if (address64 && (address64->bit_width != ACPI_MUL_8(length))) {
+                if (address64->address &&
+                    (address64->bit_width != ACPI_MUL_8(length))) {
                         ACPI_WARNING((AE_INFO,
                                       "32/64X length mismatch in %s: %d/%d",
                                       name, ACPI_MUL_8(length),