diff options
| author | Bartosz Golaszewski <bgolaszewski@baylibre.com> | 2015-01-05 15:20:54 +0100 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2015-01-25 21:23:59 -0800 |
| commit | e794704000cf7954039b8daab9dfae2a74142f07 (patch) | |
| tree | fba0eb87a16f494cd99d20b8a7f26ad7cbf45fd2 /drivers/hwmon/ina2xx.c | |
| parent | f4fe902717f3a3fa10e30544cef97b2ff2811db8 (diff) | |
| download | linux-e794704000cf7954039b8daab9dfae2a74142f07.tar.gz linux-e794704000cf7954039b8daab9dfae2a74142f07.tar.bz2 linux-e794704000cf7954039b8daab9dfae2a74142f07.zip | |
hwmon: (ina2xx) don't accept shunt values greater than the calibration factor
Shunt resistance values greater than the chip's calibration factor make no
sense since the actual value written to the register equals:
<calibration factor> / <shunt>
Bail-out from ina2xx_probe() if the configured value is greater than the
calibration factor.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/ina2xx.c')
| -rw-r--r-- | drivers/hwmon/ina2xx.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/hwmon/ina2xx.c b/drivers/hwmon/ina2xx.c index 39e017bf92fd..3234e571805c 100644 --- a/drivers/hwmon/ina2xx.c +++ b/drivers/hwmon/ina2xx.c @@ -313,7 +313,8 @@ static int ina2xx_probe(struct i2c_client *client, data->config = &ina2xx_config[data->kind]; data->client = client; - if (data->rshunt <= 0) + if (data->rshunt <= 0 || + data->rshunt > data->config->calibration_factor) return -ENODEV; ret = ina2xx_init(data); |