iio: hid-sensor-trigger: Change get poll value function order to avoid sensor properties losing after resume from S3

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commit 3bec247474 upstream.

In function _hid_sensor_power_state(), when hid_sensor_read_poll_value()
is called, sensor's all properties will be updated by the value from
sensor hardware/firmware.
In some implementation, sensor hardware/firmware will do a power cycle
during S3. In this case, after resume, once hid_sensor_read_poll_value()
is called, sensor's all properties which are kept by driver during S3
will be changed to default value.
But instead, if a set feature function is called first, sensor
hardware/firmware will be recovered to the last status. So change the
sensor_hub_set_feature() calling order to behind of set feature function
to avoid sensor properties lose.

Signed-off-by: Song Hongyan <hongyan.song@intel.com>
Acked-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>

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Song Hongyan 2017-02-22 17:17:38 +08:00 • committed by Greg Kroah-Hartman

parent cf43d679cc

commit 9808ff1517

1 changed files with 3 additions and 3 deletions

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drivers/iio/common/hid-sensors/hid-sensor-trigger.c

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