clk: meson: Hold reference returned by of_get_parent()

We should hold the reference returned by of_get_parent() and use it
to call of_node_put() for refcount balance.

Fixes: 88e2da81241e ("clk: meson: aoclk: refactor common code into dedicated file")
Fixes: 6682bd4d443f ("clk: meson: factorise meson64 peripheral clock controller drivers")
Fixes: bb6eddd1d28c ("clk: meson: meson8b: use the HHI syscon if available")

Signed-off-by: Liang He <windhl@126.com>
Link: https://lore.kernel.org/r/20220628141038.168383-1-windhl@126.com
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

diff --git a/drivers/clk/meson/meson-aoclk.c b/drivers/clk/meson/meson-aoclk.c
index 27cd2c1..434cd8f 100644 (file)
--- a/drivers/clk/meson/meson-aoclk.c
+++ b/drivers/clk/meson/meson-aoclk.c
@@ -38,6 +38,7 @@ int meson_aoclkc_probe(struct platform_device *pdev)
        struct meson_aoclk_reset_controller *rstc;
        struct meson_aoclk_data *data;
        struct device *dev = &pdev->dev;
+       struct device_node *np;
        struct regmap *regmap;
        int ret, clkid;
 
@@ -49,7 +50,9 @@ int meson_aoclkc_probe(struct platform_device *pdev)
        if (!rstc)
                return -ENOMEM;
 
-       regmap = syscon_node_to_regmap(of_get_parent(dev->of_node));
+       np = of_get_parent(dev->of_node);
+       regmap = syscon_node_to_regmap(np);
+       of_node_put(np);
        if (IS_ERR(regmap)) {
                dev_err(dev, "failed to get regmap\n");
                return PTR_ERR(regmap);

diff --git a/drivers/clk/meson/meson-eeclk.c b/drivers/clk/meson/meson-eeclk.c
index 8d5a5da..0e5e6b5 100644 (file)
--- a/drivers/clk/meson/meson-eeclk.c
+++ b/drivers/clk/meson/meson-eeclk.c
@@ -18,6 +18,7 @@ int meson_eeclkc_probe(struct platform_device *pdev)
 {
        const struct meson_eeclkc_data *data;
        struct device *dev = &pdev->dev;
+       struct device_node *np;
        struct regmap *map;
        int ret, i;
 
@@ -26,7 +27,9 @@ int meson_eeclkc_probe(struct platform_device *pdev)
                return -EINVAL;
 
        /* Get the hhi system controller node */
-       map = syscon_node_to_regmap(of_get_parent(dev->of_node));
+       np = of_get_parent(dev->of_node);
+       map = syscon_node_to_regmap(np);
+       of_node_put(np);
        if (IS_ERR(map)) {
                dev_err(dev,
                        "failed to get HHI regmap\n");

diff --git a/drivers/clk/meson/meson8b.c b/drivers/clk/meson/meson8b.c
index 8f3b7a9..827e78f 100644 (file)
--- a/drivers/clk/meson/meson8b.c
+++ b/drivers/clk/meson/meson8b.c
@@ -3792,12 +3792,15 @@ static void __init meson8b_clkc_init_common(struct device_node *np,
                        struct clk_hw_onecell_data *clk_hw_onecell_data)
 {
        struct meson8b_clk_reset *rstc;
+       struct device_node *parent_np;
        const char *notifier_clk_name;
        struct clk *notifier_clk;
        struct regmap *map;
        int i, ret;
 
-       map = syscon_node_to_regmap(of_get_parent(np));
+       parent_np = of_get_parent(np);
+       map = syscon_node_to_regmap(parent_np);
+       of_node_put(parent_np);
        if (IS_ERR(map)) {
                pr_err("failed to get HHI regmap - Trying obsolete regs\n");
                return;