From 3af5ec85f49d86ba225fdf043a2675e2733e4735 Mon Sep 17 00:00:00 2001 From: Jonathan Cameron Date: Sun, 8 May 2022 18:57:09 +0100 Subject: [PATCH] iio: resolver: ad2s90: Fix alignment for DMA safety MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit [ Upstream commit faa05ecb1349070d874810e161b653c2220e0006 ] ____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 tag is probably not where the issue was first introduced, but is likely to be far beyond the point where anyone considers backporting this fix. Fixes: 58f08b0af857 ("staging:iio:resolver:ad2s90 general cleanup") Signed-off-by: Jonathan Cameron Acked-by: Nuno Sá Link: https://lore.kernel.org/r/20220508175712.647246-90-jic23@kernel.org Signed-off-by: Sasha Levin --- drivers/iio/resolver/ad2s90.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/resolver/ad2s90.c b/drivers/iio/resolver/ad2s90.c index d6a91f137e13..be6836e55376 100644 --- a/drivers/iio/resolver/ad2s90.c +++ b/drivers/iio/resolver/ad2s90.c @@ -24,7 +24,7 @@ struct ad2s90_state { struct mutex lock; /* lock to protect rx buffer */ struct spi_device *sdev; - u8 rx[2] ____cacheline_aligned; + u8 rx[2] __aligned(IIO_DMA_MINALIGN); }; static int ad2s90_read_raw(struct iio_dev *indio_dev,