iio: imu: inv_icm42600: change invalid data error to -EBUSY

[ Upstream commit dfdc31e ]

Temperature sensor returns the temperature of the mechanical parts
of the chip. If both accel and gyro are off, the temperature sensor is
also automatically turned off and returns invalid data.

In this case, returning -EBUSY error code is better then -EINVAL and
indicates userspace that it needs to retry reading temperature in
another context.

Fixes: bc3eb02 ("iio: imu: inv_icm42600: add temperature sensor support")
Signed-off-by: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@tdk.com>
Cc: stable@vger.kernel.org
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Reviewed-by: Sean Nyekjaer <sean@geanix.com>
Link: https://patch.msgid.link/20250808-inv-icm42600-change-temperature-error-code-v1-1-986fbf63b77d@tdk.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: jmaneyrol-invn

drivers/iio/imu/inv_icm42600/inv_icm42600_temp.c

@@ -32,8 +32,12 @@ static int inv_icm42600_temp_read(struct inv_icm42600_state *st, s16 *temp)
 		goto exit;
 
 	*temp = (s16)be16_to_cpup(raw);
+	/*
+	 * Temperature data is invalid if both accel and gyro are off.
+	 * Return -EBUSY in this case.
+	 */
 	if (*temp == INV_ICM42600_DATA_INVALID)
-		ret = -EINVAL;
+		ret = -EBUSY;
 
 exit:
 	mutex_unlock(&st->lock);