From: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Whilst this is another case of the issue Lars reported with
an array of elements of smaller than 8 bytes being passed
to iio_push_to_buffers_with_timestamp, the solution here is
a bit different from the other cases and relies on __aligned
working on the stack (true since 4.6?)
This one is unusual. We have to do an explicit memset each time
as we are reading 3 bytes into a potential 4 byte channel which
may sometimes be a 2 byte channel depending on what is enabled.
As such, moving the buffer to the heap in the iio_priv structure
doesn't save us much. We can't use a nice explicit structure
on the stack either as the data channels have different storage
sizes and are all separately controlled.
Fixes: cc26ad455f57 ("iio: Add Freescale MPL3115A2 pressure / temperature sensor driver")
Reported-by: Lars-Peter Clausen <lars@xxxxxxxxxx>
Cc: Peter Meerwald <pmeerw@xxxxxxxxxx>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
---
drivers/iio/pressure/mpl3115.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/pressure/mpl3115.c b/drivers/iio/pressure/mpl3115.c
index ccdb0b70e48c..8a481dbe808c 100644
--- a/drivers/iio/pressure/mpl3115.c
+++ b/drivers/iio/pressure/mpl3115.c
@@ -144,7 +144,8 @@ static irqreturn_t mpl3115_trigger_handler(int irq, void *p)
struct iio_poll_func *pf = p;
struct iio_dev *indio_dev = pf->indio_dev;
struct mpl3115_data *data = iio_priv(indio_dev);
- u8 buffer[16]; /* 32-bit channel + 16-bit channel + padding + ts */
+ /* 32-bit channel + 16-bit channel + padding + ts */
+ u8 buffer[16] __aligned(8);
int ret, pos = 0;
mutex_lock(&data->lock);
--
2.27.0
