fdtdec_get_addr_size uses a fixed value for address_cells & size_cells
which may not work correctly always. fdtdec_get_addr_size_no_parent
will automatically calculate the cell sizes from parent but not
optimized especially when parent node is already available with the
caller.

Use fdtdec_get_addr_size_auto_parent that automatically calculate the
cell sizes and optimized for the given usecase.

Signed-off-by: Atish Patra <[email protected]>
---
 arch/riscv/lib/fdt_fixup.c | 2 +-
 lib/fdtdec.c               | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/riscv/lib/fdt_fixup.c b/arch/riscv/lib/fdt_fixup.c
index 6db48ad04a56..f2ec37b57b15 100644
--- a/arch/riscv/lib/fdt_fixup.c
+++ b/arch/riscv/lib/fdt_fixup.c
@@ -44,7 +44,7 @@ int riscv_fdt_copy_resv_mem_node(const void *src, void *dst)
        fdt_for_each_subnode(node, src, offset) {
                name = fdt_get_name(src, node, NULL);
 
-               addr = fdtdec_get_addr_size_auto_noparent(src, node,
+               addr = fdtdec_get_addr_size_auto_parent(src, offset, node,
                                                          "reg", 0, &size,
                                                          false);
                if (addr == FDT_ADDR_T_NONE) {
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index 1f2b763acc31..b62eb142ccc3 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -1296,7 +1296,8 @@ int fdtdec_add_reserved_memory(void *blob, const char 
*basename,
                const char *name = fdt_get_name(blob, node, NULL);
                phys_addr_t addr, size;
 
-               addr = fdtdec_get_addr_size(blob, node, "reg", &size);
+               addr = fdtdec_get_addr_size_auto_parent(blob, parent, node,
+                                                       "reg", 0, &size, false);
                if (addr == FDT_ADDR_T_NONE) {
                        debug("failed to read address/size for %s\n", name);
                        continue;
-- 
2.24.0

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