[ Upstream commit 9dd6b32e76ff714308964cd9ec91466a343dcb8b ] The current implementation interprets negative values returned from `dps310_calculate_temp` as error codes. This has a side effect that when negative temperature values are calculated, they are interpreted as error. Fix this by using the return value only for error handling and passing a pointer for the value. Fixes: ba6ec48e76bc ("iio: Add driver for Infineon DPS310") Signed-off-by: Thomas Haemmerle <thomas.haemmerle@leica-geosystems.com> Link: https://lore.kernel.org/r/20240415105030.1161770-2-thomas.haemmerle@leica-geosystems.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Sasha Levin <sashal@kernel.org>