From: Jonathan Cameron Jonathan.Cameron@huawei.com
stable inclusion from linux-4.19.198 commit 9f98de0e407699ad9b7c7ee733525c787800ae5b
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[ Upstream commit 679cc377a03ff1944491eafc7355c1eb1fad4109 ]
To make code more readable, use a structure to express the channel layout and ensure the timestamp is 8 byte aligned.
Found during an audit of all calls of uses of iio_push_to_buffers_with_timestamp()
Fixes: cb119d535083 ("iio: proximity: add support for PulsedLight LIDAR") Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Cc: Matt Ranostay matt.ranostay@konsulko.com Acked-by: Matt Ranostay matt.ranostay@konsulko.com Reviewed-by: Andy Shevchenko andy.shevchenko@gmail.com Link: https://lore.kernel.org/r/20210501170121.512209-14-jic23@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- drivers/iio/proximity/pulsedlight-lidar-lite-v2.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/iio/proximity/pulsedlight-lidar-lite-v2.c b/drivers/iio/proximity/pulsedlight-lidar-lite-v2.c index 67f85268b63db..0c76170224071 100644 --- a/drivers/iio/proximity/pulsedlight-lidar-lite-v2.c +++ b/drivers/iio/proximity/pulsedlight-lidar-lite-v2.c @@ -43,7 +43,11 @@ struct lidar_data { int (*xfer)(struct lidar_data *data, u8 reg, u8 *val, int len); int i2c_enabled;
- u16 buffer[8]; /* 2 byte distance + 8 byte timestamp */ + /* Ensure timestamp is naturally aligned */ + struct { + u16 chan; + s64 timestamp __aligned(8); + } scan; };
static const struct iio_chan_spec lidar_channels[] = { @@ -228,9 +232,9 @@ static irqreturn_t lidar_trigger_handler(int irq, void *private) struct lidar_data *data = iio_priv(indio_dev); int ret;
- ret = lidar_get_measurement(data, data->buffer); + ret = lidar_get_measurement(data, &data->scan.chan); if (!ret) { - iio_push_to_buffers_with_timestamp(indio_dev, data->buffer, + iio_push_to_buffers_with_timestamp(indio_dev, &data->scan, iio_get_time_ns(indio_dev)); } else if (ret != -EINVAL) { dev_err(&data->client->dev, "cannot read LIDAR measurement");