From ae0b3773721f08526c850e2d8dec85bdb870cd12 Mon Sep 17 00:00:00 2001
From: Kangjie Lu <kjlu@umn.edu>
Date: Thu, 20 Dec 2018 01:21:22 -0600
Subject: [PATCH] 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>
---
drivers/iio/frequency/ad9523.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/iio/frequency/ad9523.c b/drivers/iio/frequency/ad9523.c
index f3f94fbdd20ab..3f9be69499ecb 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)
--
GitLab