From: Jonathan Cameron Jonathan.Cameron@huawei.com
[ 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: b9a6a237ffc9 ("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 --- drivers/iio/accel/bma180.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/iio/accel/bma180.c b/drivers/iio/accel/bma180.c index 0890934ef66f..73ea64a2bff0 100644 --- a/drivers/iio/accel/bma180.c +++ b/drivers/iio/accel/bma180.c @@ -120,7 +120,11 @@ 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 { @@ -667,12 +671,12 @@ 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);