linux-kernel - [PATCH v4 1/9] iio: adc: palmas_gpadc: fix NULL dereference on rmmod

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Message-Id: <20230408114825.824505-2-risca@dalakolonin.se>
Date:   Sat,  8 Apr 2023 13:48:17 +0200
From:   Patrik Dahlström <risca@...akolonin.se>
To:     linux-iio@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, letux-kernel@...nphoenux.org,
        kernel@...a-handheld.com, pgoudagunta@...dia.com,
        hns@...delico.com, jic23@...nel.org, lars@...afoo.de,
        linux-omap@...r.kernel.org,
        Patrik Dahlström <risca@...akolonin.se>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>
Subject: [PATCH v4 1/9] iio: adc: palmas_gpadc: fix NULL dereference on rmmod

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>
---
 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 fd000345ec5c..849a697a467e 100644
--- a/drivers/iio/adc/palmas_gpadc.c
+++ b/drivers/iio/adc/palmas_gpadc.c
@@ -639,7 +639,7 @@ 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)
-- 
2.25.1