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authoramy.shih <amy.shih@advantech.com.tw>2019-06-17 08:08:50 +0000
committerGuenter Roeck <linux@roeck-us.net>2019-07-08 18:11:29 -0700
commitb3e26067874700fb38aeddf2da9844afb36f1a94 (patch)
treef85c4b2003c6f63c8c5eb2b8822fb64427cc91bc /drivers/hwmon/nct7904.c
parent23297edbc15ae19917253064c81f91c4df240f93 (diff)
hwmon: (nct7904) Add error handling in probe function.
When register read and write operations return errors, needs to add error handling. Signed-off-by: amy.shih <amy.shih@advantech.com.tw> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/nct7904.c')
-rw-r--r--drivers/hwmon/nct7904.c23
1 files changed, 18 insertions, 5 deletions
diff --git a/drivers/hwmon/nct7904.c b/drivers/hwmon/nct7904.c
index 5708171197e7..401ed4a4a576 100644
--- a/drivers/hwmon/nct7904.c
+++ b/drivers/hwmon/nct7904.c
@@ -506,6 +506,8 @@ static int nct7904_probe(struct i2c_client *client,
/* CPU_TEMP attributes */
ret = nct7904_read_reg(data, BANK_0, VT_ADC_CTRL0_REG);
+ if (ret < 0)
+ return ret;
if ((ret & 0x6) == 0x6)
data->tcpu_mask |= 1; /* TR1 */
@@ -518,11 +520,15 @@ static int nct7904_probe(struct i2c_client *client,
/* LTD */
ret = nct7904_read_reg(data, BANK_0, VT_ADC_CTRL2_REG);
+ if (ret < 0)
+ return ret;
if ((ret & 0x02) == 0x02)
data->tcpu_mask |= 0x10;
/* Multi-Function detecting for Volt and TR/TD */
ret = nct7904_read_reg(data, BANK_0, VT_ADC_MD_REG);
+ if (ret < 0)
+ return ret;
for (i = 0; i < 4; i++) {
val = (ret & (0x03 << i)) >> (i * 2);
@@ -533,22 +539,29 @@ static int nct7904_probe(struct i2c_client *client,
/* PECI */
ret = nct7904_read_reg(data, BANK_2, PFE_REG);
+ if (ret < 0)
+ return ret;
if (ret & 0x80) {
data->enable_dts = 1; //Enable DTS & PECI
} else {
ret = nct7904_read_reg(data, BANK_2, TSI_CTRL_REG);
+ if (ret < 0)
+ return ret;
if (ret & 0x80)
data->enable_dts = 0x3; //Enable DTS & TSI
}
/* Check DTS enable status */
if (data->enable_dts) {
- data->has_dts =
- nct7904_read_reg(data, BANK_0, DTS_T_CTRL0_REG) & 0xF;
+ ret = nct7904_read_reg(data, BANK_0, DTS_T_CTRL0_REG);
+ if (ret < 0)
+ return ret;
+ data->has_dts = ret & 0xF;
if (data->enable_dts & 0x2) {
- data->has_dts |=
- (nct7904_read_reg(data, BANK_0, DTS_T_CTRL1_REG) & 0xF)
- << 4;
+ ret = nct7904_read_reg(data, BANK_0, DTS_T_CTRL1_REG);
+ if (ret < 0)
+ return ret;
+ data->has_dts |= (ret & 0xF) << 4;
}
}