drivers/sbus/char: add of_node_put()

BugLink: https://bugs.launchpad.net/bugs/1811252

[ Upstream commit 6bd520ab ]

use of_node_put() to release the refcount.
Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Juerg Haefliger <juergh@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>

drivers/sbus/char/envctrl.c

@@ -910,8 +910,10 @@ static void envctrl_init_i2c_child(struct device_node *dp,
 			for (len = 0; len < PCF8584_MAX_CHANNELS; ++len) {
 				pchild->mon_type[len] = ENVCTRL_NOMON;
 			}
+			of_node_put(root_node);
 			return;
 		}
+		of_node_put(root_node);
 	}
 
 	/* Get the monitor channels. */