[PATCH 5.15 491/779] usb: aspeed-vhub: Fix refcount leak bug in ast_vhub_init_desc()

[Greg Kroah-Hartman]

From: Liang He <windhl@xxxxxxx>

[ Upstream commit 220fafb4ed04187e9c17be4152da5a7f2ffbdd8c ]

We should call of_node_put() for the reference returned by
of_get_child_by_name() which has increased the refcount.

Fixes: 30d2617fd7ed ("usb: gadget: aspeed: allow to set usb strings in device tree")
Signed-off-by: Liang He <windhl@xxxxxxx>
Link: https://lore.kernel.org/r/20220713120528.368168-1-windhl@xxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/usb/gadget/udc/aspeed-vhub/hub.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/udc/aspeed-vhub/hub.c b/drivers/usb/gadget/udc/aspeed-vhub/hub.c
index b9960fdd8a51..16a12d2d492e 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/hub.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/hub.c
@@ -1028,8 +1028,10 @@ static int ast_vhub_init_desc(struct ast_vhub *vhub)
 	/* Initialize vhub String Descriptors. */
 	INIT_LIST_HEAD(&vhub->vhub_str_desc);
 	desc_np = of_get_child_by_name(vhub_np, "vhub-strings");
-	if (desc_np)
+	if (desc_np) {
 		ret = ast_vhub_of_parse_str_desc(vhub, desc_np);
+		of_node_put(desc_np);
+	}
 	else
 		ret = ast_vhub_str_alloc_add(vhub, &ast_vhub_strings);
 
-- 
2.35.1