GDT_DPMEM_COMMAND_OFFSET
if (gdt->sc_cmd_off + gccb->gc_cmd_len + GDT_DPMEM_COMMAND_OFFSET >
gdt->sc_cmd_off + GDT_DPMEM_COMMAND_OFFSET >
gdt->sc_cmd_off + GDT_DPMEM_COMMAND_OFFSET >
htole16(GDT_DPMEM_COMMAND_OFFSET + dp_offset));