clk: qoriq: Hold reference returned by of_get_parent()

[ Upstream commit a8ea4273bc26256ce3cce83164f0f51c5bf6e127 ]

In legacy_init_clockgen(), we need to hold the reference returned
by of_get_parent() and use it to call of_node_put() for refcount
balance.

Beside, in create_sysclk(), we need to call of_node_put() on 'sysclk'
also for refcount balance.

Fixes: 0dfc86b3173f ("clk: qoriq: Move chip-specific knowledge into driver")
Signed-off-by: Liang He <windhl@126.com>
Link: https://lore.kernel.org/r/20220628143851.171299-1-windhl@126.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/clk/clk-qoriq.c b/drivers/clk/clk-qoriq.c
index 88898b97a443122193c105526b236b7c8507d49f..5eddb9f0d6bdb3993b3319e30baddfc12165eb15 100644 (file)
--- a/drivers/clk/clk-qoriq.c
+++ b/drivers/clk/clk-qoriq.c
@@ -1063,8 +1063,13 @@ static void __init _clockgen_init(struct device_node *np, bool legacy);
  */
 static void __init legacy_init_clockgen(struct device_node *np)
 {
-       if (!clockgen.node)
-               _clockgen_init(of_get_parent(np), true);
+       if (!clockgen.node) {
+               struct device_node *parent_np;
+
+               parent_np = of_get_parent(np);
+               _clockgen_init(parent_np, true);
+               of_node_put(parent_np);
+       }
 }
 
 /* Legacy node */
@@ -1159,6 +1164,7 @@ static struct clk * __init create_sysclk(const char *name)
        sysclk = of_get_child_by_name(clockgen.node, "sysclk");
        if (sysclk) {
                clk = sysclk_from_fixed(sysclk, name);
+               of_node_put(sysclk);
                if (!IS_ERR(clk))
                        return clk;
        }