From: Jonathan Cameron Date: Sun, 8 May 2022 17:57:03 +0000 (+0100) Subject: iio: potentiometer: mcp41010: Fix alignment for DMA safety X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=c5f78f4d2168ba21324095b0d46d4353c2eace4d;p=linux.git iio: potentiometer: mcp41010: Fix alignment for DMA safety ____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 --- diff --git a/drivers/iio/potentiometer/mcp41010.c b/drivers/iio/potentiometer/mcp41010.c index 30a4594d4e115..2b73c75402094 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) { \