fdtdec: Fix boundary check

In U-Boot, the reserved memory end address is considered as a inclusive
address. This notion is followed while adding a reserved memory node to
the DT.

For example:
end_address = start_address + size - 1

Follow the same notion and fix the end address computation while checking
for existing nodes.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>

diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index 9ecfa2a2d743c35a687003bc0098cdb12599d822..460f0d250b4d6414d920fdfdb18a943a8a025118 100644 (file)
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -1311,7 +1311,8 @@ int fdtdec_add_reserved_memory(void *blob, const char *basename,
                        continue;
                }
 
-               if (addr == carveout->start && (addr + size) == carveout->end) {
+               if (addr == carveout->start && (addr + size - 1) ==
+                                               carveout->end) {
                        if (phandlep)
                                *phandlep = fdt_get_phandle(blob, node);
                        return 0;