libfdt: fix error code of fdt_count_strings()
Currently, this function returns a positive value on error,
so we never know whether this function has succeeded or failed.
For example, if the given property is not found, fdt_getprop()
returns -FDT_ERR_NOTFOUND, and then this function inverts it,
i.e., returns FDT_ERR_NOTFOUND (=1).
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Fixes: bc4147ab2d69 ("fdt: Add a function to count strings")
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/lib/libfdt/fdt_ro.c b/lib/libfdt/fdt_ro.c
index 38bfcbd..7b0777b 100644
--- a/lib/libfdt/fdt_ro.c
+++ b/lib/libfdt/fdt_ro.c
@@ -517,7 +517,7 @@
list = fdt_getprop(fdt, node, property, &length);
if (!list)
- return -length;
+ return length;
for (i = 0; i < length; i++) {
int len = strlen(list);