staging:iio:ad7298: 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>

diff --git a/drivers/staging/iio/adc/ad7298_ring.c b/drivers/staging/iio/adc/ad7298_ring.c
index cd3e9cb47a643e948bccb2ea86650acd04306a4f..fd1d855ff57a1c5e2b3786afbc67f5303767a76e 100644 (file)
--- a/drivers/staging/iio/adc/ad7298_ring.c
+++ b/drivers/staging/iio/adc/ad7298_ring.c
@@ -82,7 +82,7 @@ static irqreturn_t ad7298_trigger_handler(int irq, void *p)
 
        b_sent = spi_sync(st->spi, &st->ring_msg);
        if (b_sent)
-               return b_sent;
+               goto done;
 
        if (indio_dev->scan_timestamp) {
                time_ns = iio_get_time_ns();
@@ -95,6 +95,8 @@ static irqreturn_t ad7298_trigger_handler(int irq, void *p)
                buf[i] = be16_to_cpu(st->rx_buf[i]);
 
        indio_dev->buffer->access->store_to(ring, (u8 *)buf, time_ns);
+
+done:
        iio_trigger_notify_done(indio_dev->trig);
 
        return IRQ_HANDLED;