From c5f78f4d2168ba21324095b0d46d4353c2eace4d Mon Sep 17 00:00:00 2001 From: Jonathan Cameron Date: Sun, 8 May 2022 18:57:03 +0100 Subject: [PATCH] iio: potentiometer: mcp41010: Fix alignment for DMA safety MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit ____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: 092cb71a604e ("iio: potentiometer: Add driver for Microchip MCP41xxx/42xxx") Signed-off-by: Jonathan Cameron Acked-by: Nuno Sá Link: https://lore.kernel.org/r/20220508175712.647246-84-jic23@kernel.org --- drivers/iio/potentiometer/mcp41010.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/potentiometer/mcp41010.c b/drivers/iio/potentiometer/mcp41010.c index 30a4594..2b73c75 100644 --- a/drivers/iio/potentiometer/mcp41010.c +++ b/drivers/iio/potentiometer/mcp41010.c @@ -60,7 +60,7 @@ struct mcp41010_data { const struct mcp41010_cfg *cfg; struct mutex lock; /* Protect write sequences */ unsigned int value[MCP41010_MAX_WIPERS]; /* Cache wiper values */ - u8 buf[2] ____cacheline_aligned; + u8 buf[2] __aligned(IIO_DMA_MINALIGN); }; #define MCP41010_CHANNEL(ch) { \ -- 2.7.4