[PATCH v2 02/32] cmd: fdt: Fix handling of empty properties for fdt get addr and fdt get size

[Marek Vasut]

It is perfectly valid to request an address or size of FDT property
without value, the only special case if requesting of the value of
FDT property without value. Invert the test such, that properties
without value still set the variable from 'fdt get addr/size' to
address of the property or size of the property, where the later
is 0.

Signed-off-by: Marek Vasut <marek.vasut+renesas at mailbox.org>
Reviewed-by: Simon Glass <sjg at chromium.org>
---
Cc: Heinrich Schuchardt <heinrich.schuchardt at canonical.com>
Cc: Simon Glass <sjg at chromium.org>
Cc: Tom Rini <trini at konsulko.com>
---
V2: Add RB from Simon
---
 cmd/fdt.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/cmd/fdt.c b/cmd/fdt.c
index bf2415661e2..56b3585c3ac 100644
--- a/cmd/fdt.c
+++ b/cmd/fdt.c
@@ -446,15 +446,17 @@ static int do_fdt(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 		} else {
 			nodep = fdt_getprop(
 				working_fdt, nodeoffset, prop, &len);
-			if (len == 0) {
-				/* no property value */
-				env_set(var, "");
-				return 0;
-			} else if (nodep && len > 0) {
+			if (nodep && len >= 0) {
 				if (subcmd[0] == 'v') {
 					int index = 0;
 					int ret;
 
+					if (len == 0) {
+						/* no property value */
+						env_set(var, "");
+						return 0;
+					}
+
 					if (argc == 7)
 						index = simple_strtoul(argv[6], NULL, 10);
 
-- 
2.39.2