In soc_info(), of_find_node_by_type() will return a node pointer
with refcount incremented. We should use of_node_put() when it is
not used anymore.

Signed-off-by: Liang He <win...@126.com>
---
 drivers/tty/serial/ucc_uart.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/tty/serial/ucc_uart.c b/drivers/tty/serial/ucc_uart.c
index 6000853973c1..3cc9ef08455c 100644
--- a/drivers/tty/serial/ucc_uart.c
+++ b/drivers/tty/serial/ucc_uart.c
@@ -1137,6 +1137,8 @@ static unsigned int soc_info(unsigned int *rev_h, 
unsigned int *rev_l)
                /* No compatible property, so try the name. */
                soc_string = np->name;
 
+       of_node_put(np);
+
        /* Extract the SOC number from the "PowerPC," string */
        if ((sscanf(soc_string, "PowerPC,%u", &soc) != 1) || !soc)
                return 0;
-- 
2.25.1

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