[PATCH v2 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>
---
v1 -> v2:
  - use silent variable instead of opencoding indent < 0 (Sascha)
---
 drivers/of/base.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/drivers/of/base.c b/drivers/of/base.c
index 99be24254203..51984d7d8f61 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -2082,11 +2082,14 @@ int of_diff(struct device_node *a, struct device_node *b, int indent)
 	struct property *ap, *bp;
 	struct device_node *ca, *cb;
 	int printed = 0, diff = 0;
+	bool silent = indent < 0;
 
 	list_for_each_entry(ap, &a->properties, list) {
 		bp = of_find_property(b, ap->name, NULL);
 		if (!bp) {
 			diff++;
+			if (silent)
+				continue;
 			of_print_parents(a, &printed);
 			printf("- ");
 			__of_print_property(ap, indent);
@@ -2095,6 +2098,8 @@ 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 (silent)
+				continue;
 			of_print_parents(a, &printed);
 			printf("- ");
 			__of_print_property(ap, indent);
@@ -2107,6 +2112,8 @@ 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 (silent)
+				continue;
 			of_print_parents(a, &printed);
 			printf("+ ");
 			__of_print_property(bp, indent);
@@ -2116,9 +2123,11 @@ 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, silent ? indent : indent + 1);
 		} else {
 			diff++;
+			if (silent)
+				continue;
 			of_print_parents(a, &printed);
 			__of_print_nodes(ca, indent, "- ");
 		}
@@ -2127,12 +2136,15 @@ 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 (silent)
+				continue;
 			of_print_parents(a, &printed);
 			__of_print_nodes(cb, indent, "+ ");
 		}
 	}
 
-	of_print_close(a, &printed);
+	if (!silent)
+		of_print_close(a, &printed);
 
 	return diff;
 }
-- 
2.30.2