linux-kernel - [PATCH 164/190] Revert "iio: ad9523: fix a missing check of return value"

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Message-Id: <20210421130105.1226686-165-gregkh@linuxfoundation.org>
Date:   Wed, 21 Apr 2021 15:00:39 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kangjie Lu <kjlu@....edu>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>
Subject: [PATCH 164/190] Revert "iio: ad9523: fix a missing check of return value"

This reverts commit ae0b3773721f08526c850e2d8dec85bdb870cd12.

Commits from @umn.edu addresses have been found to be submitted in "bad
faith" to try to test the kernel community's ability to review "known
malicious" changes.  The result of these submissions can be found in a
paper published at the 42nd IEEE Symposium on Security and Privacy
entitled, "Open Source Insecurity: Stealthily Introducing
Vulnerabilities via Hypocrite Commits" written by Qiushi Wu (University
of Minnesota) and Kangjie Lu (University of Minnesota).

Because of this, all submissions from this group must be reverted from
the kernel tree and will need to be re-reviewed again to determine if
they actually are a valid fix.  Until that work is complete, remove this
change to ensure that no problems are being introduced into the
codebase.

Cc: Kangjie Lu <kjlu@....edu>
Cc: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/iio/frequency/ad9523.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/iio/frequency/ad9523.c b/drivers/iio/frequency/ad9523.c
index bdb0bc3b12dd..91eb47e27db0 100644
--- a/drivers/iio/frequency/ad9523.c
+++ b/drivers/iio/frequency/ad9523.c
@@ -944,14 +944,11 @@ static int ad9523_setup(struct iio_dev *indio_dev)
 		}
 	}

-	for_each_clear_bit(i, &active_mask, AD9523_NUM_CHAN) {
-		ret = ad9523_write(indio_dev,
+	for_each_clear_bit(i, &active_mask, AD9523_NUM_CHAN)
+		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)
-- 
2.31.1