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Date: Wed, 07 Feb 2024 22:17:08 +0100 From: Javier Carrasco <javier.carrasco.cruz@...il.com> To: Jean Delvare <jdelvare@...e.com>, Guenter Roeck <linux@...ck-us.net>, Dan Carpenter <dan.carpenter@...aro.org> Cc: linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org, Javier Carrasco <javier.carrasco.cruz@...il.com> Subject: [PATCH 1/2] hwmon: chipcap2: fix uninitialized variable in cc2_get_reg_val() The reg_val variable in cc2_get_reg_val() might be used without a known value if cc2_read_reg() fails. That leads to a useless data conversion because the returned error means the read operation failed and the data is not relevant. That makes its initial value irrelevant as well, so skip the data conversion instead. If no error happens, a value is assigned to reg_val and the data conversion is required. Reported-by: Dan Carpenter <dan.carpenter@...aro.org> Closes: https://lore.kernel.org/linux-hwmon/294e4634-89d4-415e-a723-b208d8770d7c@gmail.com/T/#t Signed-off-by: Javier Carrasco <javier.carrasco.cruz@...il.com> --- drivers/hwmon/chipcap2.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/hwmon/chipcap2.c b/drivers/hwmon/chipcap2.c index a62c507b1042..3b604fc5d8ae 100644 --- a/drivers/hwmon/chipcap2.c +++ b/drivers/hwmon/chipcap2.c @@ -324,7 +324,9 @@ static int cc2_get_reg_val(struct cc2_data *data, u8 reg, long *val) int ret; ret = cc2_read_reg(data, reg, ®_val); - *val = cc2_rh_convert(reg_val); + if (!ret) + *val = cc2_rh_convert(reg_val); + cc2_disable(data); return ret; -- 2.40.1
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