From: Yang Yingliang <yangyingliang@huawei.com>
Date: Mon, 21 Nov 2022 02:32:09 +0000 (+0800)
Subject: of: property: decrement node refcount in of_fwnode_get_reference_args()
X-Git-Tag: v5.10.158~75
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8f7047f418102ff45494f9fe388315ec0fa505e5;p=thirdparty%2Fkernel%2Fstable.git

of: property: decrement node refcount in of_fwnode_get_reference_args()

[ Upstream commit 60d865bd5a9b15a3961eb1c08bd4155682a3c81e ]

In of_fwnode_get_reference_args(), the refcount of of_args.np has
been incremented in the case of successful return from
of_parse_phandle_with_args() or of_parse_phandle_with_fixed_args().

Decrement the refcount if of_args is not returned to the caller of
of_fwnode_get_reference_args().

Fixes: 3e3119d3088f ("device property: Introduce fwnode_property_get_reference_args")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Frank Rowand <frowand.list@gmail.com>
Link: https://lore.kernel.org/r/20221121023209.3909759-1-yangyingliang@huawei.com
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/of/property.c b/drivers/of/property.c
index 1d7d24e7094b0..8f998351bf4fb 100644
--- a/drivers/of/property.c
+++ b/drivers/of/property.c
@@ -956,8 +956,10 @@ of_fwnode_get_reference_args(const struct fwnode_handle *fwnode,
 						       nargs, index, &of_args);
 	if (ret < 0)
 		return ret;
-	if (!args)
+	if (!args) {
+		of_node_put(of_args.np);
 		return 0;
+	}
 
 	args->nargs = of_args.args_count;
 	args->fwnode = of_fwnode_handle(of_args.np);