This is a note to let you know that I've just added the patch titled
iio: adc: ti-adc128s052: 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-ti-adc128s052-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 92fb98e1220ad9e2e9229f79e3441c0e495aa00d
Author: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Date: Sun May 8 18:56:12 2022 +0100
iio: adc: ti-adc128s052: Fix alignment for DMA safety
[ Upstream commit 23c81e7a7e5204a08b553d07362d3082926663b8 ]
____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: 913b86468674 ("iio: adc: Add TI ADC128S052")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Acked-by: Nuno Sá <nuno.sa@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220508175712.647246-33-jic23@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/iio/adc/ti-adc128s052.c b/drivers/iio/adc/ti-adc128s052.c
index 8e7adec87755..622fd384983c 100644
--- a/drivers/iio/adc/ti-adc128s052.c
+++ b/drivers/iio/adc/ti-adc128s052.c
@@ -29,7 +29,7 @@ struct adc128 {
struct regulator *reg;
struct mutex lock;
- u8 buffer[2] ____cacheline_aligned;
+ u8 buffer[2] __aligned(IIO_DMA_MINALIGN);
};
static int adc128_adc_conversion(struct adc128 *adc, u8 channel)
