linux-kernel - [PATCH][next] iio: Fix uninitialized variable ret

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Date:   Fri, 15 Oct 2021 16:32:54 +0100
From:   Colin King <colin.king@...onical.com>
To:     Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Alexandru Ardelean <alexandru.ardelean@...log.com>,
        Mihail Chindris <mihail.chindris@...log.com>,
        linux-iio@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH][next] iio: Fix uninitialized variable ret

From: Colin Ian King <colin.king@...onical.com>

When !iio_buffer_space_available(rb) is true and signal_pending(current)
is false the end of the do-while loop is reached and the uninitialized
variable ret is zero checked. Fix this by initializing variable ret to
zero.

Addresses-Coverity: ("Uninitialized scalar variable")
Fixes: ffabbffd40f2 ("iio: Add output buffer support")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/iio/industrialio-buffer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c
index b884d78657cb..c97fb8462395 100644
--- a/drivers/iio/industrialio-buffer.c
+++ b/drivers/iio/industrialio-buffer.c
@@ -179,7 +179,7 @@ static ssize_t iio_buffer_write(struct file *filp, const char __user *buf,
 	struct iio_buffer *rb = ib->buffer;
 	struct iio_dev *indio_dev = ib->indio_dev;
 	DEFINE_WAIT_FUNC(wait, woken_wake_function);
-	int ret;
+	int ret = 0;
 	size_t written;
 
 	if (!indio_dev->info)
-- 
2.32.0