[PATCH 4.19 184/421] iio: potentiostat: lmp91000: Fix alignment of buffer in iio_push_to_buffers_with_timestamp()

[Greg Kroah-Hartman]

From: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>

[ 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@xxxxxxxxxx>
Cc: Matt Ranostay <matt.ranostay@xxxxxxxxxxxx>
Acked-by: Matt Ranostay <matt.ranostay@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20210501171352.512953-8-jic23@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/iio/potentiostat/lmp91000.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/potentiostat/lmp91000.c b/drivers/iio/potentiostat/lmp91000.c
index 90e895adf997..68f4f6fa27da 100644
--- 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[] = {
-- 
2.30.2