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[25/92] iio: adc: max1118: Fix alignment for DMA safety

Message ID 20220503085935.1533814-26-jic23@kernel.org (mailing list archive)
State Superseded
Headers show
Series IIO: Fix alignment of buffers for DMA | expand

Commit Message

Jonathan Cameron May 3, 2022, 8:58 a.m. UTC 
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>

____cacheline_aligned is an insufficient guarantee for non-coherent DMA
on platforms with 128 byte cachelines above L1.  Switch to the updated
IIO_ALIGN definition.

Fixes: a9e9c7153e96 ("iio: adc: add max1117/max1118/max1119 ADC driver")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
---
 drivers/iio/adc/max1118.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/iio/adc/max1118.c b/drivers/iio/adc/max1118.c
index a41bc570be21..6520acaa6938 100644
--- a/drivers/iio/adc/max1118.c
+++ b/drivers/iio/adc/max1118.c
@@ -42,7 +42,7 @@  struct max1118 {
 		s64 ts __aligned(8);
 	} scan;
 
-	u8 data ____cacheline_aligned;
+	u8 data __aligned(IIO_ALIGN);
 };
 
 #define MAX1118_CHANNEL(ch)						\