From 71e083aaf716fffa91cf80e85e88f3c0674be81a Mon Sep 17 00:00:00 2001 From: Markus Elfring Date: Fri, 3 Nov 2017 09:00:25 +0100 Subject: [PATCH] staging: iio: ad7152: Improve unlocking of a mutex in ad7152_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 Signed-off-by: Jonathan Cameron --- drivers/staging/iio/cdc/ad7152.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/drivers/staging/iio/cdc/ad7152.c b/drivers/staging/iio/cdc/ad7152.c index 61377ca444de..59d1b35f6a4e 100644 --- a/drivers/staging/iio/cdc/ad7152.c +++ b/drivers/staging/iio/cdc/ad7152.c @@ -118,22 +118,23 @@ static inline ssize_t ad7152_start_calib(struct device *dev, mutex_lock(&chip->state_lock); ret = i2c_smbus_write_byte_data(chip->client, AD7152_REG_CFG, regval); - if (ret < 0) { - mutex_unlock(&chip->state_lock); - return ret; - } + if (ret < 0) + goto unlock; do { mdelay(20); ret = i2c_smbus_read_byte_data(chip->client, AD7152_REG_CFG); - if (ret < 0) { - mutex_unlock(&chip->state_lock); - return ret; - } + if (ret < 0) + goto unlock; + } while ((ret == regval) && timeout--); mutex_unlock(&chip->state_lock); return len; + +unlock: + mutex_unlock(&chip->state_lock); + return ret; } static ssize_t ad7152_start_offset_calib(struct device *dev,