]> git.ipfire.org Git - thirdparty/kernel/stable.git/commit
iio: imu: adis: ensure proper DMA alignment
authorNuno Sa <nuno.sa@analog.com>
Wed, 17 Jan 2024 13:10:49 +0000 (14:10 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 23 Feb 2024 08:51:42 +0000 (09:51 +0100)
commite5925d32896e44f415a66f6071191d8bec28df41
tree350cfbc744a5cb76268f3d8be31dd46d491cb2cd
parentd2cc2d1a5f793469c293c872752e902b1346d393
iio: imu: adis: ensure proper DMA alignment

commit 8e98b87f515d8c4bae521048a037b2cc431c3fd5 upstream.

Aligning the buffer to the L1 cache is not sufficient in some platforms
as they might have larger cacheline sizes for caches after L1 and thus,
we can't guarantee DMA safety.

That was the whole reason to introduce IIO_DMA_MINALIGN in [1]. Do the same
for the sigma_delta ADCs.

[1]: https://lore.kernel.org/linux-iio/20220508175712.647246-2-jic23@kernel.org/

Fixes: ccd2b52f4ac6 ("staging:iio: Add common ADIS library")
Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240117-adis-improv-v1-1-7f90e9fad200@analog.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
include/linux/iio/imu/adis.h