diff --git a/drivers/acpi/apei/apei-base.c b/drivers/acpi/apei/apei-base.c
index 552fd9ffaca4e2d530cfc5151df76a82409f973f..3294cc8dc0730340c2b9703b09a8952ae60019a2 100644
--- a/drivers/acpi/apei/apei-base.c
+++ b/drivers/acpi/apei/apei-base.c
@@ -633,6 +633,10 @@ int apei_map_generic_address(struct acpi_generic_address *reg)
 	if (rc)
 		return rc;
 
+	/* IO space doesn't need mapping */
+	if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_IO)
+		return 0;
+
 	if (!acpi_os_map_generic_address(reg))
 		return -ENXIO;