This is a note to let you know that I've just added the patch titled
iio: dac: ad5766: Fix alignment for DMA safety
to the 5.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
iio-dac-ad5766-fix-alignment-for-dma-safety.patch
and it can be found in the queue-5.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit bf7ab49a9d638bba0fa330412b4738766057f90b
Author: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Date: Sun May 8 18:56:33 2022 +0100
iio: dac: ad5766: Fix alignment for DMA safety
[ Upstream commit c32be7f035ae430ba9c142b03ceb9f935b09ed6b ]
____cacheline_aligned is an insufficient guarantee for non-coherent DMA
on platforms with 128 byte cachelines above L1. Switch to the updated
IIO_DMA_MINALIGN definition.
Fixes: fd9373e41b9b ("iio: dac: ad5766: add driver support for AD5766")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Acked-by: Nuno Sá <nuno.sa@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220508175712.647246-54-jic23@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/iio/dac/ad5766.c b/drivers/iio/dac/ad5766.c
index 43189af2fb1f..899894523752 100644
--- a/drivers/iio/dac/ad5766.c
+++ b/drivers/iio/dac/ad5766.c
@@ -123,7 +123,7 @@ struct ad5766_state {
u32 d32;
u16 w16[2];
u8 b8[4];
- } data[3] ____cacheline_aligned;
+ } data[3] __aligned(IIO_DMA_MINALIGN);
};
struct ad5766_span_tbl {
