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Message-Id: <20240913-veml6035-v1-3-0b09c0c90418@gmail.com>
Date: Fri, 13 Sep 2024 15:18:58 +0200
From: Javier Carrasco <javier.carrasco.cruz@...il.com>
To: Jonathan Cameron <jic23@...nel.org>,
Lars-Peter Clausen <lars@...afoo.de>, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>, Rishi Gupta <gupt21@...il.com>
Cc: linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org,
Jonathan Cameron <Jonathan.Cameron@...wei.com>,
Javier Carrasco <javier.carrasco.cruz@...il.com>, stable@...r.kernel.org
Subject: [PATCH 3/7] iio: light: veml6030: fix IIO device retrieval from
embedded device
The dev pointer that is received as an argument in the
in_illuminance_period_available_show function references the device
embedded in the IIO device, not in the i2c client.
dev_to_iio_dev() must be used to accessthe right data. The current
implementation leads to a segmentation fault on every attempt to read
the attribute because indio_dev gets a NULL assignment.
This bug has been present since the first appearance of the driver,
apparently since the last version (V6) before getting applied. A
constant attribute was used until then, and the last modifications might
have not been tested again.
Cc: stable@...r.kernel.org
Fixes: 7b779f573c48 ("iio: light: add driver for veml6030 ambient light sensor")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@...il.com>
---
drivers/iio/light/veml6030.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/iio/light/veml6030.c b/drivers/iio/light/veml6030.c
index 2e86d310952e..df2ba3078b91 100644
--- a/drivers/iio/light/veml6030.c
+++ b/drivers/iio/light/veml6030.c
@@ -99,9 +99,8 @@ static const char * const period_values[] = {
static ssize_t in_illuminance_period_available_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
+ struct veml6030_data *data = iio_priv(dev_to_iio_dev(dev));
int ret, reg, x;
- struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
- struct veml6030_data *data = iio_priv(indio_dev);
ret = regmap_read(data->regmap, VEML6030_REG_ALS_CONF, ®);
if (ret) {
--
2.43.0
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