diff options
| author | Kangjie Lu <kjlu@umn.edu> | 2018-12-20 01:21:22 -0600 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2019-01-05 16:10:50 +0000 |
| commit | ae0b3773721f08526c850e2d8dec85bdb870cd12 (patch) | |
| tree | 1b0925b73f1cf2582567206bd5d648a4ab0f205f /drivers/iio | |
| parent | c546d49656143855093c7b7fde60866e6e23a69d (diff) | |
| download | linux-ae0b3773721f08526c850e2d8dec85bdb870cd12.tar.gz | |
iio: ad9523: fix a missing check of return value
If ad9523_write() fails, indio_dev may get incorrect data. The fix inserts a check for the return value of ad9523_write(), and it fails, returns an error. Signed-off-by: Kangjie Lu <kjlu@umn.edu> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/frequency/ad9523.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/iio/frequency/ad9523.c b/drivers/iio/frequency/ad9523.c index f3f94fbdd20a..3f9be69499ec 100644 --- a/drivers/iio/frequency/ad9523.c +++ b/drivers/iio/frequency/ad9523.c @@ -943,11 +943,14 @@ static int ad9523_setup(struct iio_dev *indio_dev) } } - for_each_clear_bit(i, &active_mask, AD9523_NUM_CHAN) - ad9523_write(indio_dev, + for_each_clear_bit(i, &active_mask, AD9523_NUM_CHAN) { + ret = ad9523_write(indio_dev, AD9523_CHANNEL_CLOCK_DIST(i), AD9523_CLK_DIST_DRIVER_MODE(TRISTATE) | AD9523_CLK_DIST_PWR_DOWN_EN); + if (ret < 0) + return ret; + } ret = ad9523_write(indio_dev, AD9523_POWER_DOWN_CTRL, 0); if (ret < 0) |