From 31a99443a53aa65cdaaaaa3bcd5ed685eec87419 Mon Sep 17 00:00:00 2001 From: Cristina Moraru Date: Sun, 25 Oct 2015 23:31:41 +0200 Subject: [PATCH] staging: iio: adis16060_core: Fix error handling We need to check adis16060_spi_read return code to avoid feeding user space with bogus data. While, at it introduce out_unlock label in order to simplify locking on error path. Signed-off-by: Cristina Moraru Signed-off-by: Greg Kroah-Hartman --- drivers/staging/iio/gyro/adis16060_core.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/drivers/staging/iio/gyro/adis16060_core.c b/drivers/staging/iio/gyro/adis16060_core.c index 80783e703f0d..981b63f83a7b 100644 --- a/drivers/staging/iio/gyro/adis16060_core.c +++ b/drivers/staging/iio/gyro/adis16060_core.c @@ -89,11 +89,13 @@ static int adis16060_read_raw(struct iio_dev *indio_dev, /* Take the iio_dev status lock */ mutex_lock(&indio_dev->mlock); ret = adis16060_spi_write(indio_dev, chan->address); - if (ret < 0) { - mutex_unlock(&indio_dev->mlock); - return ret; - } + if (ret < 0) + goto out_unlock; + ret = adis16060_spi_read(indio_dev, &tval); + if (ret < 0) + goto out_unlock; + mutex_unlock(&indio_dev->mlock); *val = tval; return IIO_VAL_INT; @@ -108,6 +110,10 @@ static int adis16060_read_raw(struct iio_dev *indio_dev, } return -EINVAL; + +out_unlock: + mutex_unlock(&indio_dev->mlock); + return ret; } static const struct iio_info adis16060_info = {