[PATCH 4/5] of: silence of_diff output for negative indents

[Ahmad Fatoum]

Negative indents just led to strange behavior so far. Repurpose them to
mean that the caller is not interested in console output. This makes
them useful for negative tests (Sanity check that two different nodes
are indeed different).

Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
---
 drivers/of/base.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/of/base.c b/drivers/of/base.c
index 99be24254203..ffa79785f80e 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -2087,6 +2087,8 @@ int of_diff(struct device_node *a, struct device_node *b, int indent)
 		bp = of_find_property(b, ap->name, NULL);
 		if (!bp) {
 			diff++;
+			if (indent < 0)
+				continue;
 			of_print_parents(a, &printed);
 			printf("- ");
 			__of_print_property(ap, indent);
@@ -2095,6 +2097,8 @@ int of_diff(struct device_node *a, struct device_node *b, int indent)
 
 		if (ap->length != bp->length || memcmp(of_property_get_value(ap), of_property_get_value(bp), bp->length)) {
 			diff++;
+			if (indent < 0)
+				continue;
 			of_print_parents(a, &printed);
 			printf("- ");
 			__of_print_property(ap, indent);
@@ -2107,6 +2111,8 @@ int of_diff(struct device_node *a, struct device_node *b, int indent)
 		ap = of_find_property(a, bp->name, NULL);
 		if (!ap) {
 			diff++;
+			if (indent < 0)
+				continue;
 			of_print_parents(a, &printed);
 			printf("+ ");
 			__of_print_property(bp, indent);
@@ -2116,9 +2122,11 @@ int of_diff(struct device_node *a, struct device_node *b, int indent)
 	for_each_child_of_node(a, ca) {
 		cb = of_get_child_by_name(b, ca->name);
 		if (cb) {
-			diff += of_diff(ca, cb, indent + 1);
+			diff += of_diff(ca, cb, indent >= 0 ? indent + 1 : indent);
 		} else {
 			diff++;
+			if (indent < 0)
+				continue;
 			of_print_parents(a, &printed);
 			__of_print_nodes(ca, indent, "- ");
 		}
@@ -2127,12 +2135,15 @@ int of_diff(struct device_node *a, struct device_node *b, int indent)
 	for_each_child_of_node(b, cb) {
 		if (!of_get_child_by_name(a, cb->name)) {
 			diff++;
+			if (indent < 0)
+				continue;
 			of_print_parents(a, &printed);
 			__of_print_nodes(cb, indent, "+ ");
 		}
 	}
 
-	of_print_close(a, &printed);
+	if (indent >= 0)
+		of_print_close(a, &printed);
 
 	return diff;
 }
-- 
2.30.2