iio: adc: at91-sama5d2_adc: fix an error code in at91_adc_allocate_trigger()

The at91_adc_allocate_trigger() function is supposed to return error
pointers.  Returning a NULL will cause an Oops.

Fixes: 5e1a1da0f8c9 ("iio: adc: at91-sama5d2_adc: add hw trigger and buffer support")
Signed-off-by: Dan Carpenter <error27@gmail.com>
Link: https://lore.kernel.org/r/5d728f9d-31d1-410d-a0b3-df6a63a2c8ba@kili.mountain
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c
index 50d02e5fc6fc125177e47805d3487badb8ef67f0..7258912fe17b758f279de776b420c206ed313f4a 100644 (file)
--- a/drivers/iio/adc/at91-sama5d2_adc.c
+++ b/drivers/iio/adc/at91-sama5d2_adc.c
@@ -1409,7 +1409,7 @@ static struct iio_trigger *at91_adc_allocate_trigger(struct iio_dev *indio,
        trig = devm_iio_trigger_alloc(&indio->dev, "%s-dev%d-%s", indio->name,
                                iio_device_id(indio), trigger_name);
        if (!trig)
-               return NULL;
+               return ERR_PTR(-ENOMEM);
 
        trig->dev.parent = indio->dev.parent;
        iio_trigger_set_drvdata(trig, indio);