[PATCH 6.5 244/285] regulator: raa215300: Fix resource leak in case of error

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6.5-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>

[ Upstream commit e21ac64e669e960688e79bf5babeed63132dac8a ]

The clk_register_clkdev() allocates memory by calling vclkdev_alloc() and
this memory is not freed in the error path. Similarly, resources allocated
by clk_register_fixed_rate() are not freed in the error path.

Fix these issues by using devm_clk_hw_register_fixed_rate() and
devm_clk_hw_register_clkdev().

After this, the static variable clk is not needed. Replace it with 
local variable hw in probe() and drop calling clk_unregister_fixed_rate()
from raa215300_rtc_unregister_device().

Fixes: 7bce16630837 ("regulator: Add Renesas PMIC RAA215300 driver")
Cc: stable@xxxxxxxxxx
Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230816135550.146657-2-biju.das.jz@xxxxxxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/regulator/raa215300.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/regulator/raa215300.c b/drivers/regulator/raa215300.c
index 8e1a4c86b9789..253645696d0bb 100644
--- a/drivers/regulator/raa215300.c
+++ b/drivers/regulator/raa215300.c
@@ -38,8 +38,6 @@
 #define RAA215300_REG_BLOCK_EN_RTC_EN	BIT(6)
 #define RAA215300_RTC_DEFAULT_ADDR	0x6f
 
-static struct clk *clk;
-
 static const struct regmap_config raa215300_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
@@ -49,10 +47,6 @@ static const struct regmap_config raa215300_regmap_config = {
 static void raa215300_rtc_unregister_device(void *data)
 {
 	i2c_unregister_device(data);
-	if (!clk) {
-		clk_unregister_fixed_rate(clk);
-		clk = NULL;
-	}
 }
 
 static int raa215300_clk_present(struct i2c_client *client, const char *name)
@@ -130,10 +124,16 @@ static int raa215300_i2c_probe(struct i2c_client *client)
 		u32 addr = RAA215300_RTC_DEFAULT_ADDR;
 		struct i2c_board_info info = {};
 		struct i2c_client *rtc_client;
+		struct clk_hw *hw;
 		ssize_t size;
 
-		clk = clk_register_fixed_rate(NULL, clk_name, NULL, 0, 32000);
-		clk_register_clkdev(clk, clk_name, NULL);
+		hw = devm_clk_hw_register_fixed_rate(dev, clk_name, NULL, 0, 32000);
+		if (IS_ERR(hw))
+			return PTR_ERR(hw);
+
+		ret = devm_clk_hw_register_clkdev(dev, hw, clk_name, NULL);
+		if (ret)
+			return dev_err_probe(dev, ret, "Failed to initialize clkdev\n");
 
 		if (np) {
 			int i;
-- 
2.40.1






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