iio: hid-sensor-trigger: Change get poll value function order to avoid sensor propert...
authorSong Hongyan <hongyan.song@intel.com>
Wed, 22 Feb 2017 09:17:38 +0000 (17:17 +0800)
committerJonathan Cameron <jic23@kernel.org>
Sun, 5 Mar 2017 10:26:47 +0000 (10:26 +0000)
commit3bec247474469f769af41e8c80d3a100dd97dd76
tree46aa75b1a3470ece108e23a51b77f95ce9fea9af
parent2d62e0768d3c28536d4cfe4c40ba1e5e8e442a93
iio: hid-sensor-trigger: Change get poll value function order to avoid sensor properties losing after resume from S3

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>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
drivers/iio/common/hid-sensors/hid-sensor-trigger.c