staging:iio:ad799x: Do not return error code in interrupt handler

The interrupt handler should only ever return one of the three irqreturn_t
constants and not an error code. Also make sure to always call
iio_trigger_notify_done before leaving the trigger handler.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/staging/iio/adc/ad799x_core.c

@@ -350,10 +350,10 @@ static irqreturn_t ad799x_event_handler(int irq, void *private)
 
 	ret = ad799x_i2c_read8(st, AD7998_ALERT_STAT_REG, &status);
 	if (ret)
-		return ret;
+		goto done;
 
 	if (!status)
-		return -EIO;
+		goto done;
 
 	ad799x_i2c_write8(st, AD7998_ALERT_STAT_REG, AD7998_ALERT_STAT_CLEAR);
 
@@ -372,6 +372,7 @@ static irqreturn_t ad799x_event_handler(int irq, void *private)
 				       iio_get_time_ns());
 	}
 
+done:
 	return IRQ_HANDLED;
 }
 

drivers/staging/iio/adc/ad799x_ring.c

@@ -81,8 +81,6 @@ static irqreturn_t ad799x_trigger_handler(int irq, void *p)
 	ring->access->store_to(indio_dev->buffer, rxbuf, time_ns);
 done:
 	kfree(rxbuf);
-	if (b_sent < 0)
-		return b_sent;
 out:
 	iio_trigger_notify_done(indio_dev->trig);