diff options
Diffstat (limited to 'drivers/staging/iio/cdc/ad7746.c')
| -rw-r--r-- | drivers/staging/iio/cdc/ad7746.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/drivers/staging/iio/cdc/ad7746.c b/drivers/staging/iio/cdc/ad7746.c index a124853a05f0..c4a864725376 100644 --- a/drivers/staging/iio/cdc/ad7746.c +++ b/drivers/staging/iio/cdc/ad7746.c @@ -302,23 +302,24 @@ static inline ssize_t ad7746_start_calib(struct device *dev, mutex_lock(&chip->lock); regval |= chip->config; ret = i2c_smbus_write_byte_data(chip->client, AD7746_REG_CFG, regval); - if (ret < 0) { - mutex_unlock(&chip->lock); - return ret; - } + if (ret < 0) + goto unlock; do { msleep(20); ret = i2c_smbus_read_byte_data(chip->client, AD7746_REG_CFG); - if (ret < 0) { - mutex_unlock(&chip->lock); - return ret; - } + if (ret < 0) + goto unlock; + } while ((ret == regval) && timeout--); mutex_unlock(&chip->lock); return len; + +unlock: + mutex_unlock(&chip->lock); + return ret; } static ssize_t ad7746_start_offset_calib(struct device *dev, |