iio: adc: ad7266: Fix potential timestamp alignment issue.

[ Upstream commit 52d349884738c346961e153f195f4c7fe186fcf4 ]

On architectures where an s64 is only 32-bit aligned insufficient padding
would be left between the earlier elements and the timestamp. Use
aligned_s64 to enforce the correct placement and ensure the storage is
large enough.

Fixes: 54e018da3141 ("iio:ad7266: Mark transfer buffer as __be16") # aligned_s64 is much newer.
Reported-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Link: https://patch.msgid.link/20250413103443.2420727-2-jic23@kernel.org
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/iio/adc/ad7266.c b/drivers/iio/adc/ad7266.c
index 98648c679a55c179d98908baf7afe46f902ff0be..2ace3aafe4978822f893d20291b19170cd530293 100644 (file)
--- a/drivers/iio/adc/ad7266.c
+++ b/drivers/iio/adc/ad7266.c
@@ -44,7 +44,7 @@ struct ad7266_state {
         */
        struct {
                __be16 sample[2];
-               s64 timestamp;
+               aligned_s64 timestamp;
        } data __aligned(IIO_DMA_MINALIGN);
 };