[PATCH 5.15 572/917] clk: mvebu: ap-cpu-clk: Fix a memory leak in error handling paths

Greg Kroah-Hartman
2021-11-16T00:32:55Z

From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>

[ Upstream commit af9617b419f77cf0b99702a7b2b0519da0d27715 ]

If we exit the for_each_of_cpu_node loop early, the reference on the
current node must be decremented, otherwise there is a leak.

Fixes: f756e362d938 ("clk: mvebu: add CPU clock driver for Armada 7K/8K")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/545df946044fc1fc05a4217cdf0054be7a79e49e.1619161112.git.christophe.jaillet@wanadoo.fr
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/clk/mvebu/ap-cpu-clk.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/clk/mvebu/ap-cpu-clk.c b/drivers/clk/mvebu/ap-cpu-clk.c
index 08ba59ec3fb17..71bdd7c3ff034 100644
--- a/drivers/clk/mvebu/ap-cpu-clk.c
+++ b/drivers/clk/mvebu/ap-cpu-clk.c
@@ -256,12 +256,15 @@ static int ap_cpu_clock_probe(struct platform_device *pdev)
int cpu, err;

err = of_property_read_u32(dn, "reg", &cpu);
- if (WARN_ON(err))
+ if (WARN_ON(err)) {
+ of_node_put(dn);
return err;
+ }

/* If cpu2 or cpu3 is enabled */
if (cpu & APN806_CLUSTER_NUM_MASK) {
nclusters = 2;
+ of_node_put(dn);
break;
}
}
@@ -288,8 +291,10 @@ static int ap_cpu_clock_probe(struct platform_device *pdev)
int cpu, err;

err = of_property_read_u32(dn, "reg", &cpu);
- if (WARN_ON(err))
+ if (WARN_ON(err)) {
+ of_node_put(dn);
return err;
+ }

cluster_index = cpu & APN806_CLUSTER_NUM_MASK;
cluster_index >>= APN806_CLUSTER_NUM_OFFSET;
@@ -301,6 +306,7 @@ static int ap_cpu_clock_probe(struct platform_device *pdev)
parent = of_clk_get(np, cluster_index);
if (IS_ERR(parent)) {
dev_err(dev, "Could not get the clock parent\n");
+ of_node_put(dn);
return -EINVAL;
}
parent_name = __clk_get_name(parent);
@@ -319,8 +325,10 @@ static int ap_cpu_clock_probe(struct platform_device *pdev)
init.parent_names = &parent_name;

ret = devm_clk_hw_register(dev, &ap_cpu_clk[cluster_index].hw);
- if (ret)
+ if (ret) {
+ of_node_put(dn);
return ret;
+ }
ap_cpu_data->hws[cluster_index] = &ap_cpu_clk[cluster_index].hw;
}

--
2.33.0