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    Subject[PATCH v2 11/16] hwmon: (mr75203) add protection for negative voltage value
    Date
    This change makes sure the returned voltage vlaue is 0 or positive.

    Signed-off-by: Eliav Farber <farbere@amazon.com>
    ---
    drivers/hwmon/mr75203.c | 7 +++++++
    1 file changed, 7 insertions(+)

    diff --git a/drivers/hwmon/mr75203.c b/drivers/hwmon/mr75203.c
    index 24a00339cfd8..e3191f590167 100644
    --- a/drivers/hwmon/mr75203.c
    +++ b/drivers/hwmon/mr75203.c
    @@ -218,6 +218,13 @@ static int pvt_read_in(struct device *dev, u32 attr, int channel, long *val)
    return ret;

    n &= SAMPLE_DATA_MSK;
    +
    + /* Voltage can't be negative */
    + if (PVT_N_CONST * n < PVT_R_CONST) {
    + *val = 0;
    + return 0;
    + }
    +
    /* Convert the N bitstream count into voltage */
    *val = pvt->vd[channel].pre_scaler;
    *val *= (PVT_N_CONST * n - PVT_R_CONST);
    --
    2.37.1
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