[PATCH] clk/meson: Hold reference returned by of_get_parent()
From: Liang He <hidden>
Date: 2022-06-24 10:28:45
Also in:
linux-amlogic, linux-clk
Subsystem:
arm/amlogic meson soc clock framework, common clk framework, the rest · Maintainers:
Neil Armstrong, Jerome Brunet, Michael Turquette, Stephen Boyd, Linus Torvalds
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 <redacted>
---
these bugs are found in 5.19rc2
these bugs are confirmed not fixed by lore.kernel.org
these bugs are compiled tested in 5.19rc2 with at91_dt_defconfig
drivers/clk/meson/meson-aoclk.c | 5 ++++-
drivers/clk/meson/meson-eeclk.c | 5 ++++-
drivers/clk/meson/meson8b.c | 5 ++++-
3 files changed, 12 insertions(+), 3 deletions(-)
diff --git a/drivers/clk/meson/meson-aoclk.c b/drivers/clk/meson/meson-aoclk.c
index 27cd2c1f3f61..434cd8f9de82 100644
--- 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 8d5a5dab955a..0e5e6b57eb20 100644
--- 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 8f3b7a94a667..54188319f349 100644
--- a/drivers/clk/meson/meson8b.c
+++ b/drivers/clk/meson/meson8b.c@@ -3796,8 +3796,11 @@ static void __init meson8b_clkc_init_common(struct device_node *np, struct clk *notifier_clk; struct regmap *map; int i, ret; + struct device_node *tp; - map = syscon_node_to_regmap(of_get_parent(np)); + tp = of_get_parent(np); + map = syscon_node_to_regmap(tp); + of_node_put(tp); if (IS_ERR(map)) { pr_err("failed to get HHI regmap - Trying obsolete regs\n"); return;
--
2.25.1
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