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>

diff --git a/drivers/acpi/acpica/tbfadt.c b/drivers/acpi/acpica/tbfadt.c
index a8191ef..43fe886 100644 (file)
--- 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));
+               }
        }
 }