diff options
| author | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2021-05-01 18:01:04 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2021-05-17 13:54:28 +0100 |
| commit | 151dbf0078da98206817ee0b87d499035479ef11 (patch) | |
| tree | 5dfd35af85107bfb1d2ce1e99000f78a8170cbca /drivers/iio/accel/bma220_spi.c | |
| parent | fc36da3131a747a9367a05caf06de19be1bcc972 (diff) | |
iio: accel: bma220: Fix buffer alignment in iio_push_to_buffers_with_timestamp()
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: 194dc4c71413 ("iio: accel: Add triggered buffer support for BMA220")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20210501170121.512209-3-jic23@kernel.org
Diffstat (limited to 'drivers/iio/accel/bma220_spi.c')
| -rw-r--r-- | drivers/iio/accel/bma220_spi.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/iio/accel/bma220_spi.c b/drivers/iio/accel/bma220_spi.c index 36fc9876dbca..0622c7936499 100644 --- a/drivers/iio/accel/bma220_spi.c +++ b/drivers/iio/accel/bma220_spi.c @@ -63,7 +63,11 @@ static const int bma220_scale_table[][2] = { struct bma220_data { struct spi_device *spi_device; struct mutex lock; - s8 buffer[16]; /* 3x8-bit channels + 5x8 padding + 8x8 timestamp */ + struct { + s8 chans[3]; + /* Ensure timestamp is naturally aligned. */ + s64 timestamp __aligned(8); + } scan; u8 tx_buf[2] ____cacheline_aligned; }; @@ -94,12 +98,12 @@ static irqreturn_t bma220_trigger_handler(int irq, void *p) mutex_lock(&data->lock); data->tx_buf[0] = BMA220_REG_ACCEL_X | BMA220_READ_MASK; - ret = spi_write_then_read(spi, data->tx_buf, 1, data->buffer, + ret = spi_write_then_read(spi, data->tx_buf, 1, &data->scan.chans, ARRAY_SIZE(bma220_channels) - 1); if (ret < 0) goto err; - iio_push_to_buffers_with_timestamp(indio_dev, data->buffer, + iio_push_to_buffers_with_timestamp(indio_dev, &data->scan, pf->timestamp); err: mutex_unlock(&data->lock); |