[PATCH 4.19 32/43] iio: hid-sensor-temperature: Fix issues of timestamp channel

Greg Kroah-Hartman
2021-03-22T13:03:17Z

From: Ye Xiang <xiang.ye@intel.com>

commit 141e7633aa4d2838d1f6ad5c74cccc53547c16ac upstream.

This patch fixes 2 issues of timestamp channel:
1. This patch ensures that there is sufficient space and correct
alignment for the timestamp.
2. Correct the timestamp channel scan index.

Fixes: 59d0f2da3569 ("iio: hid: Add temperature sensor support")
Signed-off-by: Ye Xiang <xiang.ye@intel.com>
Cc: <Stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210303063615.12130-4-xiang.ye@intel.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/iio/temperature/hid-sensor-temperature.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)

--- a/drivers/iio/temperature/hid-sensor-temperature.c
+++ b/drivers/iio/temperature/hid-sensor-temperature.c
@@ -28,7 +28,10 @@
struct temperature_state {
struct hid_sensor_common common_attributes;
struct hid_sensor_hub_attribute_info temperature_attr;
- s32 temperature_data;
+ struct {
+ s32 temperature_data;
+ u64 timestamp __aligned(8);
+ } scan;
int scale_pre_decml;
int scale_post_decml;
int scale_precision;
@@ -45,7 +48,7 @@ static const struct iio_chan_spec temper
BIT(IIO_CHAN_INFO_SAMP_FREQ) |
BIT(IIO_CHAN_INFO_HYSTERESIS),
},
- IIO_CHAN_SOFT_TIMESTAMP(3),
+ IIO_CHAN_SOFT_TIMESTAMP(1),
};

/* Adjust channel real bits based on report descriptor */
@@ -136,9 +139,8 @@ static int temperature_proc_event(struct
struct temperature_state *temp_st = iio_priv(indio_dev);

if (atomic_read(&temp_st->common_attributes.data_ready))
- iio_push_to_buffers_with_timestamp(indio_dev,
- &temp_st->temperature_data,
- iio_get_time_ns(indio_dev));
+ iio_push_to_buffers_with_timestamp(indio_dev, &temp_st->scan,
+ iio_get_time_ns(indio_dev));

return 0;
}
@@ -153,7 +155,7 @@ static int temperature_capture_sample(st

switch (usage_id) {
case HID_USAGE_SENSOR_DATA_ENVIRONMENTAL_TEMPERATURE:
- temp_st->temperature_data = *(s32 *)raw_data;
+ temp_st->scan.temperature_data = *(s32 *)raw_data;
return 0;
default:
return -EINVAL;