On Mon, Jun 17, 2019 at 08:08:50AM +0000, amy.s...@advantech.com.tw wrote:
> From: "amy.shih" <amy.s...@advantech.com.tw>
>
> When register read and write operations return errors, needs to add
> error handling.
>
> Signed-off-by: amy.shih <amy.s...@advantech.com.tw>
Applied.
Thanks,
Guenter
> ---
> 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;
> }
> }
>
