diff options
| author | Markus Elfring <elfring@users.sourceforge.net> | 2017-11-03 09:26:28 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2017-12-02 10:40:07 +0000 |
| commit | aa6b707c146d4d19e87af0b995fab95bec5990a3 (patch) | |
| tree | eab5ddb4494dfc154f107e24d70b92379f7076a9 /drivers/staging/iio | |
| parent | 71e083aaf716fffa91cf80e85e88f3c0674be81a (diff) | |
staging: iio: ad7746: Improve unlocking of a mutex in ad7746_start_calib()
* Add a jump target so that a call of the function "mutex_unlock" is stored
only twice in this function implementation.
* Replace two calls by goto statements.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/staging/iio')
| -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, |