iio: imu: st_lsm6dsx: always enter interrupt thread

The interrupt source can come from multiple sources,
fifo and wake interrupts.
Enter interrupt thread to check which interrupt that has fired.
Signed-off-by: Sean Nyekjaer <sean@geanix.com>
Reviewed-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c

@@ -1715,13 +1715,6 @@ static struct iio_dev *st_lsm6dsx_alloc_iiodev(struct st_lsm6dsx_hw *hw,
 	return iio_dev;
 }
 
-static irqreturn_t st_lsm6dsx_handler_irq(int irq, void *private)
-{
-	struct st_lsm6dsx_hw *hw = private;
-
-	return hw->sip > 0 ? IRQ_WAKE_THREAD : IRQ_NONE;
-}
-
 static irqreturn_t st_lsm6dsx_handler_thread(int irq, void *private)
 {
 	struct st_lsm6dsx_hw *hw = private;
@@ -1779,7 +1772,7 @@ static int st_lsm6dsx_irq_setup(struct st_lsm6dsx_hw *hw)
 	}
 
 	err = devm_request_threaded_irq(hw->dev, hw->irq,
-					st_lsm6dsx_handler_irq,
+					NULL,
 					st_lsm6dsx_handler_thread,
 					irq_type | IRQF_ONESHOT,
 					"lsm6dsx", hw);