iio: meter: ade7758: Fix indio_dev->trig assignment

commit 0495081179212b758775df752e657ea71dcae020 upstream.

This can result in wrong reference count for trigger device, call
iio_trigger_get to increment reference.
Refer to http://www.spinics.net/lists/linux-iio/msg13669.html for discussion
with Jonathan.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/iio/meter/ade7758_trigger.c b/drivers/staging/iio/meter/ade7758_trigger.c
index 7a94ddd42f593e7bc1355cd06ebfcb6c400ff014..8c4f2896cd0d6fbf119a2395f40d58569f2bd39a 100644 (file)
--- a/drivers/staging/iio/meter/ade7758_trigger.c
+++ b/drivers/staging/iio/meter/ade7758_trigger.c
@@ -85,7 +85,7 @@ int ade7758_probe_trigger(struct iio_dev *indio_dev)
        ret = iio_trigger_register(st->trig);
 
        /* select default trigger */
-       indio_dev->trig = st->trig;
+       indio_dev->trig = iio_trigger_get(st->trig);
        if (ret)
                goto error_free_irq;