From: "amy.shih" <[email protected]> When register read and write operations return errors, needs to add error handling.
Signed-off-by: amy.shih <[email protected]> --- Changes in v2: - Check for errors on register read and write operations. drivers/hwmon/nct7904.c | 23 ++++++++++++++++++----- 1 file 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; } } -- 2.17.1
