Messages in this thread Patch in this message | | | From | SF Markus Elfring <> | Subject | [PATCH] iio/proximity/srf08: Improve unlocking of a mutex in srf08_read_ranging() | Date | Thu, 26 Oct 2017 17:00:07 +0200 |
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From: Markus Elfring <elfring@users.sourceforge.net> Date: Thu, 26 Oct 2017 16:51:08 +0200
Add a jump target so that a call of the function "mutex_unlock" is stored only once at the end of 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> --- drivers/iio/proximity/srf08.c | 14 +++++--------- 1 file changed, 5 insertions(+), 9 deletions(-)
diff --git a/drivers/iio/proximity/srf08.c b/drivers/iio/proximity/srf08.c index f2bf783f829a..85957550195b 100644 --- a/drivers/iio/proximity/srf08.c +++ b/drivers/iio/proximity/srf08.c @@ -135,8 +135,7 @@ static int srf08_read_ranging(struct srf08_data *data) SRF08_WRITE_COMMAND, SRF08_CMD_RANGING_CM); if (ret < 0) { dev_err(&client->dev, "write command - err: %d\n", ret); - mutex_unlock(&data->lock); - return ret; + goto unlock; } /* @@ -163,20 +162,17 @@ static int srf08_read_ranging(struct srf08_data *data) if (ret >= 255 || ret <= 0) { dev_err(&client->dev, "device not ready\n"); - mutex_unlock(&data->lock); - return -EIO; + ret = -EIO; + goto unlock; } ret = i2c_smbus_read_word_swapped(data->client, SRF08_READ_ECHO_1_HIGH); - if (ret < 0) { + if (ret < 0) dev_err(&client->dev, "cannot read distance: ret=%d\n", ret); - mutex_unlock(&data->lock); - return ret; - } +unlock: mutex_unlock(&data->lock); - return ret; } -- 2.14.3
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