[PATCH 4.9 22/70] drivers: iio: magnetometer: Fix sparse endianness warnings cast to restricted __be16

Greg Kroah-Hartman
2020-09-21T16:34:23Z

From: Sandhya Bankar <bankarsandhya512@gmail.com>

commit 69c72ec9c80bbd206c6fac73874d73e69cc623b4 upstream.

Fix the following sparse endianness warnings:

drivers/iio/magnetometer/ak8975.c:716:16: warning: cast to restricted __le16
drivers/iio/magnetometer/ak8975.c:837:19: warning: cast to restricted __le16
drivers/iio/magnetometer/ak8975.c:838:19: warning: cast to restricted __le16
drivers/iio/magnetometer/ak8975.c:839:19: warning: cast to restricted __le16

Signed-off-by: Sandhya Bankar <bankarsandhya512@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/iio/magnetometer/ak8975.c | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)

--- a/drivers/iio/magnetometer/ak8975.c
+++ b/drivers/iio/magnetometer/ak8975.c
@@ -690,6 +690,7 @@ static int ak8975_read_axis(struct iio_d
struct ak8975_data *data = iio_priv(indio_dev);
const struct i2c_client *client = data->client;
const struct ak_def *def = data->def;
+ __le16 rval;
u16 buff;
int ret;

@@ -703,7 +704,7 @@ static int ak8975_read_axis(struct iio_d

ret = i2c_smbus_read_i2c_block_data_or_emulated(
client, def->data_regs[index],
- sizeof(buff), (u8*)&buff);
+ sizeof(rval), (u8*)&rval);
if (ret < 0)
goto exit;

@@ -713,7 +714,7 @@ static int ak8975_read_axis(struct iio_d
pm_runtime_put_autosuspend(&data->client->dev);

/* Swap bytes and convert to valid range. */
- buff = le16_to_cpu(buff);
+ buff = le16_to_cpu(rval);
*val = clamp_t(s16, buff, -def->range, def->range);
return IIO_VAL_INT;

@@ -813,6 +814,7 @@ static void ak8975_fill_buffer(struct ii
const struct ak_def *def = data->def;
int ret;
s16 buff[8]; /* 3 x 16 bits axis values + 1 aligned 64 bits timestamp */
+ __le16 fval[3];

mutex_lock(&data->lock);

@@ -826,17 +828,17 @@ static void ak8975_fill_buffer(struct ii
*/
ret = i2c_smbus_read_i2c_block_data_or_emulated(client,
def->data_regs[0],
- 3 * sizeof(buff[0]),
- (u8 *)buff);
+ 3 * sizeof(fval[0]),
+ (u8 *)fval);
if (ret < 0)
goto unlock;

mutex_unlock(&data->lock);

/* Clamp to valid range. */
- buff[0] = clamp_t(s16, le16_to_cpu(buff[0]), -def->range, def->range);
- buff[1] = clamp_t(s16, le16_to_cpu(buff[1]), -def->range, def->range);
- buff[2] = clamp_t(s16, le16_to_cpu(buff[2]), -def->range, def->range);
+ buff[0] = clamp_t(s16, le16_to_cpu(fval[0]), -def->range, def->range);
+ buff[1] = clamp_t(s16, le16_to_cpu(fval[1]), -def->range, def->range);
+ buff[2] = clamp_t(s16, le16_to_cpu(fval[2]), -def->range, def->range);

iio_push_to_buffers_with_timestamp(indio_dev, buff,
iio_get_time_ns(indio_dev));