]> 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 08:25:06 +0000 (09:25 +0100)
commit68f2bdcbd7dbad82c02df06597a8145b0c02c409
treeea82ba0d6b342579fb2b16b42360d36f53632bac
parentc0f2ab954b02e672618604f4217f911343390bac
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