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iio: accel: bma180: Fix buffer alignment in iio_push_to_buffers_with_timestamp()

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[ Upstream commit fc36da3131a747a9367a05caf06de19be1bcc972 ]

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 this function.

Fixes: b9a6a237ff ("iio:bma180: Drop _update_scan_mode()")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Peter Meerwald <pmeerw@pmeerw.net>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20210501170121.512209-2-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jonathan Cameron 2021-05-01 18:01:03 +01:00 committed by Greg Kroah-Hartman
parent 2edfba8a55
commit 3cca4db5f7
1 changed files with 7 additions and 3 deletions
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10
drivers/iio/accel/bma180.c
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@ -164,7 +164,11 @@ struct bma180_data {
int scale;
int bw;
bool pmode;
u8 buff[16]; /* 3x 16-bit + 8-bit + padding + timestamp */
/* Ensure timestamp is naturally aligned */
struct {
s16 chan[4];
s64 timestamp __aligned(8);
} scan;
};
enum bma180_chan {
@ -943,12 +947,12 @@ static irqreturn_t bma180_trigger_handler(int irq, void *p)
mutex_unlock(&data->mutex);
goto err;
}
((s16 *)data->buff)[i++] = ret;
data->scan.chan[i++] = ret;
}
mutex_unlock(&data->mutex);
iio_push_to_buffers_with_timestamp(indio_dev, data->buff, time_ns);
iio_push_to_buffers_with_timestamp(indio_dev, &data->scan, time_ns);
err:
iio_trigger_notify_done(indio_dev->trig);