Re: [PATCH 1/4] iio: hid-sensor-humidity: Fix alignment issue of timestamp channel
From: Jonathan Cameron <jic23@kernel.org>
Date: 2021-03-06 17:06:35
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On Wed, 3 Mar 2021 14:36:12 +0800 Ye Xiang [off-list ref] wrote:
This patch ensures that, there is sufficient space and correct
alignment for the timestamp.
Fixes: d7ed89d5aadf ("iio: hid: Add humidity sensor support")
Signed-off-by: Ye Xiang <redacted>ouch. I guess we were trampling over the next few elements and somehow getting away with it (mostly). Applied to the fixes-togreg branch of iio.git and marked for stable. As the next patch isn't a fix, we'll have to wait for this to get upstream and round the loop so I can apply the next patch via the slower path. Give me a poke if I seem to have lost it once the dependency is in my togreg branch. thanks, Jonathan
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--- drivers/iio/humidity/hid-sensor-humidity.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-)diff --git a/drivers/iio/humidity/hid-sensor-humidity.c b/drivers/iio/humidity/hid-sensor-humidity.c index ec88ae3f233d..74383abc0d44 100644 --- a/drivers/iio/humidity/hid-sensor-humidity.c +++ b/drivers/iio/humidity/hid-sensor-humidity.c@@ -15,7 +15,10 @@ struct hid_humidity_state { struct hid_sensor_common common_attributes; struct hid_sensor_hub_attribute_info humidity_attr; - s32 humidity_data; + struct { + s32 humidity_data; + u64 timestamp __aligned(8); + } scan; int scale_pre_decml; int scale_post_decml; int scale_precision;@@ -129,9 +132,8 @@ static int humidity_proc_event(struct hid_sensor_hub_device *hsdev, struct hid_humidity_state *humid_st = iio_priv(indio_dev); if (atomic_read(&humid_st->common_attributes.data_ready)) - iio_push_to_buffers_with_timestamp(indio_dev, - &humid_st->humidity_data, - iio_get_time_ns(indio_dev)); + iio_push_to_buffers_with_timestamp(indio_dev, &humid_st->scan, + iio_get_time_ns(indio_dev)); return 0; }@@ -146,7 +148,7 @@ static int humidity_capture_sample(struct hid_sensor_hub_device *hsdev, switch (usage_id) { case HID_USAGE_SENSOR_ATMOSPHERIC_HUMIDITY: - humid_st->humidity_data = *(s32 *)raw_data; + humid_st->scan.humidity_data = *(s32 *)raw_data; return 0; default: