Merge tag 'iio-fixes-4.18a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus

Jonathan writes:

First set of IIO fixes for the 4.18 cycle.

* bmp280
- Fix wrong relative humidity unit.
* buffer
- Fix a function signature to match the function.
* inv_mpu6050
- Fix a regression in which older ACPI devices won't have working
interrupts due to lack of information on the interrupt type.
* mma8452
- Don't ignore data ready interrupt when handling interrupts as will
look like an unhandled interrupt.
* tsl2x7x/tsl2772
- Avoid a potential division by zero.

drivers/iio/accel/mma8452.c

···
 	if (src < 0)
 		return IRQ_NONE;
 
-	if (!(src & data->chip_info->enabled_events))
+	if (!(src & (data->chip_info->enabled_events | MMA8452_INT_DRDY)))
 		return IRQ_NONE;
 
 	if (src & MMA8452_INT_DRDY) {

drivers/iio/imu/inv_mpu6050/inv_mpu_core.c

···
 	}
 
 	irq_type = irqd_get_trigger_type(desc);
+	if (!irq_type)
+		irq_type = IRQF_TRIGGER_RISING;
 	if (irq_type == IRQF_TRIGGER_RISING)
 		st->irq_mask = INV_MPU6050_ACTIVE_HIGH;
 	else if (irq_type == IRQF_TRIGGER_FALLING)

drivers/iio/light/tsl2772.c

···
 			"%s: failed to get lux\n", __func__);
 		return lux_val;
 	}
+	if (lux_val == 0)
+		return -ERANGE;
 
 	ret = (chip->settings.als_cal_target * chip->settings.als_gain_trim) /
 			lux_val;

drivers/iio/pressure/bmp280-core.c

···
 	}
 	comp_humidity = bmp280_compensate_humidity(data, adc_humidity);
 
-	*val = comp_humidity;
-	*val2 = 1024;
+	*val = comp_humidity * 1000 / 1024;
 
-	return IIO_VAL_FRACTIONAL;
+	return IIO_VAL_INT;
 }
 
 static int bmp280_read_raw(struct iio_dev *indio_dev,

include/linux/iio/buffer-dma.h

···
 	char __user *user_buffer);
 size_t iio_dma_buffer_data_available(struct iio_buffer *buffer);
 int iio_dma_buffer_set_bytes_per_datum(struct iio_buffer *buffer, size_t bpd);
-int iio_dma_buffer_set_length(struct iio_buffer *buffer, int length);
+int iio_dma_buffer_set_length(struct iio_buffer *buffer, unsigned int length);
 int iio_dma_buffer_request_update(struct iio_buffer *buffer);
 
 int iio_dma_buffer_init(struct iio_dma_buffer_queue *queue,