fdtdec: correct test on return of fdt_node_offset_by_phandle

The result of fdt_node_offset_by_phandle is negative for error,
so this patch corrects the check of this result in
fdtdec_parse_phandle_with_args.

This patch allows to have the same behavior with or without OF_LIVE
for the function dev_read_phandle_with_args with cell_name = NULL and
with invalid phandle.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index b8fc5e2..ee1bd41 100644 (file)
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -746,7 +746,7 @@ int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
                        if (cells_name || cur_index == index) {
                                node = fdt_node_offset_by_phandle(blob,
                                                                  phandle);
-                               if (!node) {
+                               if (node < 0) {
                                        debug("%s: could not find phandle\n",
                                              fdt_get_name(blob, src_node,
                                                           NULL));