This is a note to let you know that I've just added the patch titled
iio: adc: ti-adc161s626: 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-adc161s626-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 9e184948dd0821613ba65b285303eeb226186c15
Author: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Date: Sun May 8 18:56:13 2022 +0100
iio: adc: ti-adc161s626: Fix alignment for DMA safety
[ Upstream commit 3a828f204a110dc9f253c4cf3c1103d00a0681da ]
____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: 4d671b71beef ("iio: adc: ti-adc161s626: add support for TI 1-channel differential ADCs")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Cc: Matt Ranostay <mranostay@xxxxxxxxx>
Acked-by: Nuno Sá <nuno.sa@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220508175712.647246-34-jic23@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/iio/adc/ti-adc161s626.c b/drivers/iio/adc/ti-adc161s626.c
index 75ca7f1c8726..b789891dcf49 100644
--- a/drivers/iio/adc/ti-adc161s626.c
+++ b/drivers/iio/adc/ti-adc161s626.c
@@ -71,7 +71,7 @@ struct ti_adc_data {
u8 read_size;
u8 shift;
- u8 buffer[16] ____cacheline_aligned;
+ u8 buffer[16] __aligned(IIO_DMA_MINALIGN);
};
static int ti_adc_read_measurement(struct ti_adc_data *data,
