This is a note to let you know that I've just added the patch titled
iio: adc: hi8435: 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-adc-hi8435-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 83c38b9ede88ea083ea487a2fbfab3527cba2991
Author: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Date: Sun May 8 18:56:00 2022 +0100
iio: adc: hi8435: Fix alignment for DMA safety
[ Upstream commit 48e4ae96b0b10f93de23b86fd34e573c44e95ab3 ]
____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: 72aa29ce0a59 ("iio: adc: hi8435: Holt HI-8435 threshold detector")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Acked-by: Nuno Sá <nuno.sa@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220508175712.647246-21-jic23@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/iio/adc/hi8435.c b/drivers/iio/adc/hi8435.c
index 8eb0140df133..771fa12bdc02 100644
--- a/drivers/iio/adc/hi8435.c
+++ b/drivers/iio/adc/hi8435.c
@@ -49,7 +49,7 @@ struct hi8435_priv {
unsigned threshold_lo[2]; /* GND-Open and Supply-Open thresholds */
unsigned threshold_hi[2]; /* GND-Open and Supply-Open thresholds */
- u8 reg_buffer[3] ____cacheline_aligned;
+ u8 reg_buffer[3] __aligned(IIO_DMA_MINALIGN);
};
static int hi8435_readb(struct hi8435_priv *priv, u8 reg, u8 *val)
