iio: Don't silently expect attribute types

The iio_triggered_buffer_setup_ext() and the
devm_iio_kfifo_buffer_setup_ext() were changed by
commit 15097c7a1adc ("iio: buffer: wrap all buffer attributes into iio_dev_attr")
to silently expect that all attributes given in buffer_attrs array are
device-attributes. This expectation was not forced by the API - and some
drivers did register attributes created by IIO_CONST_ATTR().

When using IIO_CONST_ATTRs the added attribute "wrapping" does not copy
the pointer to stored string constant and when the sysfs file is read the
kernel will access to invalid location.

Change the function signatures to expect an array of iio_dev_attrs to
avoid similar errors in the future.

Merge conflict resolved whilst applying due to patch crossing with
two new drivers (kx022a accelerometer and ad4130 ADC).

Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com>
Tested-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/63f54787a684eb1232f1c5d275a09c786987fe4a.1664782676.git.mazziesaccount@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

4 files changed, 19 insertions, 19 deletions

diff --git a/drivers/iio/accel/adxl367.c b/drivers/iio/accel/adxl367.c
index d8e98f65f25d..90b7ae6d42b7 100644
--- a/drivers/iio/accel/adxl367.c
+++ b/drivers/iio/accel/adxl367.c
@@ -1191,11 +1191,11 @@ static IIO_DEVICE_ATTR(hwfifo_watermark, 0444,
 static IIO_DEVICE_ATTR(hwfifo_enabled, 0444,
 		       adxl367_get_fifo_enabled, NULL, 0);
 
-static const struct attribute *adxl367_fifo_attributes[] = {
-	&iio_dev_attr_hwfifo_watermark_min.dev_attr.attr,
-	&iio_dev_attr_hwfifo_watermark_max.dev_attr.attr,
-	&iio_dev_attr_hwfifo_watermark.dev_attr.attr,
-	&iio_dev_attr_hwfifo_enabled.dev_attr.attr,
+static const struct iio_dev_attr *adxl367_fifo_attributes[] = {
+	&iio_dev_attr_hwfifo_watermark_min,
+	&iio_dev_attr_hwfifo_watermark_max,
+	&iio_dev_attr_hwfifo_watermark,
+	&iio_dev_attr_hwfifo_enabled,
 	NULL,
 };
 
diff --git a/drivers/iio/accel/adxl372.c b/drivers/iio/accel/adxl372.c
index 90e1d726b9c5..c4193286eb05 100644
--- a/drivers/iio/accel/adxl372.c
+++ b/drivers/iio/accel/adxl372.c
@@ -1006,11 +1006,11 @@ static IIO_DEVICE_ATTR(hwfifo_watermark, 0444,
 static IIO_DEVICE_ATTR(hwfifo_enabled, 0444,
 		       adxl372_get_fifo_enabled, NULL, 0);
 
-static const struct attribute *adxl372_fifo_attributes[] = {
-	&iio_dev_attr_hwfifo_watermark_min.dev_attr.attr,
-	&iio_dev_attr_hwfifo_watermark_max.dev_attr.attr,
-	&iio_dev_attr_hwfifo_watermark.dev_attr.attr,
-	&iio_dev_attr_hwfifo_enabled.dev_attr.attr,
+static const struct iio_dev_attr *adxl372_fifo_attributes[] = {
+	&iio_dev_attr_hwfifo_watermark_min,
+	&iio_dev_attr_hwfifo_watermark_max,
+	&iio_dev_attr_hwfifo_watermark,
+	&iio_dev_attr_hwfifo_enabled,
 	NULL,
 };
 
diff --git a/drivers/iio/accel/bmc150-accel-core.c b/drivers/iio/accel/bmc150-accel-core.c
index b4a077944896..110591804b4c 100644
--- a/drivers/iio/accel/bmc150-accel-core.c
+++ b/drivers/iio/accel/bmc150-accel-core.c
@@ -933,11 +933,11 @@ static IIO_DEVICE_ATTR(hwfifo_enabled, S_IRUGO,
 static IIO_DEVICE_ATTR(hwfifo_watermark, S_IRUGO,
 		       bmc150_accel_get_fifo_watermark, NULL, 0);
 
-static const struct attribute *bmc150_accel_fifo_attributes[] = {
-	&iio_dev_attr_hwfifo_watermark_min.dev_attr.attr,
-	&iio_dev_attr_hwfifo_watermark_max.dev_attr.attr,
-	&iio_dev_attr_hwfifo_watermark.dev_attr.attr,
-	&iio_dev_attr_hwfifo_enabled.dev_attr.attr,
+static const struct iio_dev_attr *bmc150_accel_fifo_attributes[] = {
+	&iio_dev_attr_hwfifo_watermark_min,
+	&iio_dev_attr_hwfifo_watermark_max,
+	&iio_dev_attr_hwfifo_watermark,
+	&iio_dev_attr_hwfifo_enabled,
 	NULL,
 };
 
@@ -1665,7 +1665,7 @@ int bmc150_accel_core_probe(struct device *dev, struct regmap *regmap, int irq,
 			    enum bmc150_type type, const char *name,
 			    bool block_supported)
 {
-	const struct attribute **fifo_attrs;
+	const struct iio_dev_attr **fifo_attrs;
 	struct bmc150_accel_data *data;
 	struct iio_dev *indio_dev;
 	int ret;
diff --git a/drivers/iio/accel/kionix-kx022a.c b/drivers/iio/accel/kionix-kx022a.c
index 50de7f9a1cc7..f866859855cd 100644
--- a/drivers/iio/accel/kionix-kx022a.c
+++ b/drivers/iio/accel/kionix-kx022a.c
@@ -575,9 +575,9 @@ static ssize_t hwfifo_watermark_show(struct device *dev,
 static IIO_DEVICE_ATTR_RO(hwfifo_enabled, 0);
 static IIO_DEVICE_ATTR_RO(hwfifo_watermark, 0);
 
-static const struct attribute *kx022a_fifo_attributes[] = {
-	&iio_dev_attr_hwfifo_watermark.dev_attr.attr,
-	&iio_dev_attr_hwfifo_enabled.dev_attr.attr,
+static const struct iio_dev_attr *kx022a_fifo_attributes[] = {
+	&iio_dev_attr_hwfifo_watermark,
+	&iio_dev_attr_hwfifo_enabled,
 	NULL
 };