From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Sun, 8 May 2022 17:56:33 +0000 (+0100)
Subject: iio: dac: ad5766: Fix alignment for DMA safety
X-Git-Tag: v5.18.18~460
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5cc2c6a04fcc1dbfe1c6a8f956ff5caa6144d043;p=thirdparty%2Fkernel%2Fstable.git

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@huawei.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-54-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/iio/dac/ad5766.c b/drivers/iio/dac/ad5766.c
index 43189af2fb1f3..899894523752f 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 {