ACPICA: Check for non-zero address before being converted to GAS

Reported-by: FreeBSD community
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 9 insertions, 7 deletions

diff --git a/drivers/acpi/acpica/tbfadt.c b/drivers/acpi/acpica/tbfadt.c
index a8191efd9aa6..43fe886b41a2 100644
--- a/drivers/acpi/acpica/tbfadt.c
+++ b/drivers/acpi/acpica/tbfadt.c
@@ -618,12 +618,14 @@ static void acpi_tb_setup_fadt_registers(void)
                     ACPI_ADD_PTR(struct acpi_generic_address, &acpi_gbl_FADT,
                                  fadt_pm_info_table[i].source);
 
-                acpi_tb_init_generic_address(fadt_pm_info_table[i].target,
-                                             source64->space_id,
-                                             pm1_register_byte_width,
-                                             source64->address +
-                                             (fadt_pm_info_table[i].
-                                              register_num *
-                                              pm1_register_byte_width));
+                if (source64->address) {
+                        acpi_tb_init_generic_address(fadt_pm_info_table[i].
+                                                     target, source64->space_id,
+                                                     pm1_register_byte_width,
+                                                     source64->address +
+                                                     (fadt_pm_info_table[i].
+                                                      register_num *
+                                                      pm1_register_byte_width));
+                }
         }
 }