From: Fabien Parent <fparent@baylibre.com>
To: linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org,
linux-arm-kernel@lists.infradead.org, linux-iio@vger.kernel.org,
matthias.bgg@gmail.com, jic23@kernel.org
Cc: Fabien Parent <fparent@baylibre.com>,
alexandru.ardelean@analog.com, chun-hung.wu@mediatek.com,
lars@metafoo.de, pmeerw@pmeerw.net
Subject: [PATCH v2] iio: adc: mediatek: fix unset field
Date: Sun, 18 Oct 2020 19:15:45 +0200 [thread overview]
Message-ID: <20201018171545.3190476-1-fparent@baylibre.com> (raw)
dev_comp field is used in a couple of places but it is never set. This
results in kernel oops when dereferencing a NULL pointer. Set the
`dev_comp` field correctly in the probe function.
Fixes: 6d97024dce23 ("iio: adc: mediatek: mt6577-auxadc, add mt6765 support")
Signed-off-by: Fabien Parent <fparent@baylibre.com>
---
Changelog:
V2:
* s/of_device_get_match_data/device_get_match_data
* include mod_devicetable.h and property.h instead of of_*.h headers
drivers/iio/adc/mt6577_auxadc.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/iio/adc/mt6577_auxadc.c b/drivers/iio/adc/mt6577_auxadc.c
index ac415cb089cd..79c1dd68b909 100644
--- a/drivers/iio/adc/mt6577_auxadc.c
+++ b/drivers/iio/adc/mt6577_auxadc.c
@@ -9,9 +9,9 @@
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
+#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>
+#include <linux/property.h>
#include <linux/iopoll.h>
#include <linux/io.h>
#include <linux/iio/iio.h>
@@ -276,6 +276,8 @@ static int mt6577_auxadc_probe(struct platform_device *pdev)
goto err_disable_clk;
}
+ adc_dev->dev_comp = device_get_match_data(&pdev->dev);
+
mutex_init(&adc_dev->lock);
mt6577_auxadc_mod_reg(adc_dev->reg_base + MT6577_AUXADC_MISC,
--
2.28.0
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next reply other threads:[~2020-10-18 17:16 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-18 17:15 Fabien Parent [this message]
2020-10-18 18:31 ` [PATCH v2] iio: adc: mediatek: fix unset field Andy Shevchenko
2020-10-18 18:33 ` Andy Shevchenko
2020-10-18 19:43 ` Fabien Parent
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