linux-kernel - [PATCH AUTOSEL 4.14] iio: adc: palmas_gpadc: fix NULL dereference on rmmod

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Message-Id: <20230420110355.506432-1-sashal@kernel.org>
Date:   Thu, 20 Apr 2023 07:03:53 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Patrik Dahlström <risca@...akolonin.se>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Sasha Levin <sashal@...nel.org>, jic23@...nel.org,
        linux-iio@...r.kernel.org
Subject: [PATCH AUTOSEL 4.14] iio: adc: palmas_gpadc: fix NULL dereference on rmmod

From: Patrik Dahlström <risca@...akolonin.se>

[ Upstream commit 49f76c499d38bf67803438eee88c8300d0f6ce09 ]

Calling dev_to_iio_dev() on a platform device pointer is undefined and
will make adc NULL.

Signed-off-by: Patrik Dahlström <risca@...akolonin.se>
Link: https://lore.kernel.org/r/20230313205029.1881745-1-risca@dalakolonin.se
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/iio/adc/palmas_gpadc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/adc/palmas_gpadc.c b/drivers/iio/adc/palmas_gpadc.c
index f5218461ae255..f422df4daadcb 100644
--- a/drivers/iio/adc/palmas_gpadc.c
+++ b/drivers/iio/adc/palmas_gpadc.c
@@ -634,7 +634,7 @@ static int palmas_gpadc_probe(struct platform_device *pdev)
 
 static int palmas_gpadc_remove(struct platform_device *pdev)
 {
-	struct iio_dev *indio_dev = dev_to_iio_dev(&pdev->dev);
+	struct iio_dev *indio_dev = dev_get_drvdata(&pdev->dev);
 	struct palmas_gpadc *adc = iio_priv(indio_dev);
 
 	if (adc->wakeup1_enable || adc->wakeup2_enable)
-- 
2.39.2