In IORT spec (http://infocenter.arm.com/help/topic/com.arm.doc.den0049d/DEN0049D_IO_Remapping_Table.pdf), id_num means Number of IDs minus one, update the comment. Signed-off-by: Hanjun Guo <guohanjun@xxxxxxxxxx> --- This patch just for comments, needs to be upstream in ACPICA first. include/acpi/actbl2.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h index e45ced2..382642f 100644 --- a/include/acpi/actbl2.h +++ b/include/acpi/actbl2.h @@ -104,7 +104,7 @@ enum acpi_iort_node_type { struct acpi_iort_id_mapping { u32 input_base; /* Lowest value in input range */ - u32 id_count; /* Number of IDs */ + u32 id_count; /* Number of IDs in the range minus one */ u32 output_base; /* Lowest value in output range */ u32 output_reference; /* A reference to the output node */ u32 flags; -- 1.7.12.4