5.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Cong Nguyen commit 06fab97602fe400bea843176f485bbac07a668e2 upstream. The MPU-3050 gyroscope output registers hold 16-bit two's complement values; the angular velocity channels are declared with .sign = 's'. When mpu3050_read_raw() handles IIO_CHAN_INFO_RAW it reads the register via a big-endian regmap_bulk_read() and assigns it with: *val = be16_to_cpu(raw_val); be16_to_cpu() yields an unsigned 16-bit quantity, so negative rates (bit 15 set) are reported to userspace as large positive integers (e.g. -1 becomes 65535) instead of the correct negative value. Cast to s16 before the assignment, matching the temperature channel a few lines above which already handles the sign correctly. Fixes: 3904b28efb2c ("iio: gyro: Add driver for the MPU-3050 gyroscope") Cc: stable@vger.kernel.org Assisted-by: Claude:claude-opus-4 Signed-off-by: Cong Nguyen Reviewed-by: Linus Walleij Reviewed-by: Joshua Crofts Reviewed-by: David Lechner Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/iio/gyro/mpu3050-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/iio/gyro/mpu3050-core.c +++ b/drivers/iio/gyro/mpu3050-core.c @@ -354,7 +354,7 @@ static int mpu3050_read_raw(struct iio_d goto out_read_raw_unlock; } - *val = be16_to_cpu(raw_val); + *val = (s16)be16_to_cpu(raw_val); ret = IIO_VAL_INT; goto out_read_raw_unlock;