iio: temperature: ltc2983: fix u32 read into a unsigned long long

Currently the read of temp using of_property_read_u32_index is reading
a u32 value into a unsigned long long.  This relies on machine endianness
to work correctly, so fix this by reading a u32 value and setting temp
to this value.

Addresses-Coverity: ("Reliance on integer endianness")
Fixes: f110f3188e56 ("iio: temperature: Add support for LTC2983")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/temperature/ltc2983.c b/drivers/iio/temperature/ltc2983.c
index ddf4702..d39c0d6 100644 (file)
--- a/drivers/iio/temperature/ltc2983.c
+++ b/drivers/iio/temperature/ltc2983.c
@@ -444,8 +444,10 @@ static struct ltc2983_custom_sensor *__ltc2983_custom_sensor_new(
                        else
                                temp = __convert_to_raw(temp, resolution);
                } else {
-                       of_property_read_u32_index(np, propname, index,
-                                                  (u32 *)&temp);
+                       u32 t32;
+
+                       of_property_read_u32_index(np, propname, index, &t32);
+                       temp = t32;
                }
 
                for (j = 0; j < n_size; j++)