[PATCH 6.4 629/800] nvmem: sunplus-ocotp: release otp->clk before return

Greg Kroah-Hartman
2023-07-16T20:23:42Z

From: Yi Yingao <m202271736@hust.edu.cn>

[ Upstream commit 095bb8ba45f28ed15296eb5b7662e03e57d5e34e ]

Smatch reports:
drivers/nvmem/sunplus-ocotp.c:205 sp_ocotp_probe()
warn: 'otp->clk' from clk_prepare() not released on lines: 196.

In the function sp_ocotp_probe(struct platform_device *pdev), otp->clk may
not be released before return.

To fix this issue, using function clk_unprepare() to release otp->clk.

Fixes: 8747ec2e9762 ("nvmem: Add driver for OCOTP in Sunplus SP7021")
Signed-off-by: Yi Yingao <m202271736@hust.edu.cn>
Reviewed-by: Dongliang Mu <dzm91@hust.edu.cn>
Message-ID: <20230509085237.5917-1-m202271736@hust.edu.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/nvmem/sunplus-ocotp.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/nvmem/sunplus-ocotp.c b/drivers/nvmem/sunplus-ocotp.c
index 52b928a7a6d58..f85350b17d672 100644
--- a/drivers/nvmem/sunplus-ocotp.c
+++ b/drivers/nvmem/sunplus-ocotp.c
@@ -192,9 +192,11 @@ static int sp_ocotp_probe(struct platform_device *pdev)
sp_ocotp_nvmem_config.dev = dev;

nvmem = devm_nvmem_register(dev, &sp_ocotp_nvmem_config);
- if (IS_ERR(nvmem))
- return dev_err_probe(&pdev->dev, PTR_ERR(nvmem),
+ if (IS_ERR(nvmem)) {
+ ret = dev_err_probe(&pdev->dev, PTR_ERR(nvmem),
"register nvmem device fail\n");
+ goto err;
+ }

platform_set_drvdata(pdev, nvmem);

@@ -203,6 +205,9 @@ static int sp_ocotp_probe(struct platform_device *pdev)
(int)OTP_WORD_SIZE, (int)QAC628_OTP_SIZE);

return 0;
+err:
+ clk_unprepare(otp->clk);
+ return ret;
}

static const struct of_device_id sp_ocotp_dt_ids[] = {
--
2.39.2