iio: hid_sensor_hub: Fix indio_dev->trig assignment

commit 55a6f9ddfdea0d2d343cd1b39baf8aa752664b6e 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>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
index 7dcf839..1be235b 100644 (file)
--- a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
+++ b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
@@ -99,7 +99,8 @@ int hid_sensor_setup_trigger(struct iio_dev *indio_dev, const char *name,
                dev_err(&indio_dev->dev, "Trigger Register Failed\n");
                goto error_free_trig;
        }
-       indio_dev->trig = attrb->trigger = trig;
+       attrb->trigger = trig;
+       indio_dev->trig = iio_trigger_get(trig);
 
        return ret;