From: Jonathan Cameron Date: Sun, 8 May 2022 17:56:00 +0000 (+0100) Subject: iio: adc: hi8435: Fix alignment for DMA safety X-Git-Tag: block-6.0-2022-08-12~26^2~26^2~133 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=48e4ae96b0b10f93de23b86fd34e573c44e95ab3;p=linux-block.git iio: adc: hi8435: 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: 72aa29ce0a59 ("iio: adc: hi8435: Holt HI-8435 threshold detector") Signed-off-by: Jonathan Cameron Acked-by: Nuno Sá Link: https://lore.kernel.org/r/20220508175712.647246-21-jic23@kernel.org --- diff --git a/drivers/iio/adc/hi8435.c b/drivers/iio/adc/hi8435.c index 8eb0140df133..771fa12bdc02 100644 --- a/drivers/iio/adc/hi8435.c +++ b/drivers/iio/adc/hi8435.c @@ -49,7 +49,7 @@ struct hi8435_priv { unsigned threshold_lo[2]; /* GND-Open and Supply-Open thresholds */ unsigned threshold_hi[2]; /* GND-Open and Supply-Open thresholds */ - u8 reg_buffer[3] ____cacheline_aligned; + u8 reg_buffer[3] __aligned(IIO_DMA_MINALIGN); }; static int hi8435_readb(struct hi8435_priv *priv, u8 reg, u8 *val)