iio: potentiostat: lmp91000: Fix alignment of buffer in iio_push_to_buffers_with_time...

[ Upstream commit 8979b67ec61abc232636400ee8c758a16a73c95f ]

Add __aligned(8) to ensure the buffer passed to
iio_push_to_buffers_with_timestamp() is suitable for the naturally
aligned timestamp that will be inserted.

Here structure is not used, because this buffer is also used
elsewhere in the driver.

Fixes: 67e17300dc1d ("iio: potentiostat: add LMP91000 support")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Matt Ranostay <matt.ranostay@konsulko.com>
Acked-by: Matt Ranostay <matt.ranostay@konsulko.com>
Link: https://lore.kernel.org/r/20210501171352.512953-8-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/iio/potentiostat/lmp91000.c b/drivers/iio/potentiostat/lmp91000.c
index f34ca76..d7ff74a 100644 (file)
--- a/drivers/iio/potentiostat/lmp91000.c
+++ b/drivers/iio/potentiostat/lmp91000.c
@@ -71,8 +71,8 @@ struct lmp91000_data {
 
        struct completion completion;
        u8 chan_select;
-
-       u32 buffer[4]; /* 64-bit data + 64-bit timestamp */
+       /* 64-bit data + 64-bit naturally aligned timestamp */
+       u32 buffer[4] __aligned(8);
 };
 
 static const struct iio_chan_spec lmp91000_channels[] = {