From: Jonathan Cameron Date: Sun, 8 May 2022 17:57:08 +0000 (+0100) Subject: iio: resolver: ad2s1200: Fix alignment for DMA safety X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=37882314d3bdc2ae775ebb9fa8ed7a94cd1aad61;p=linux.git iio: resolver: ad2s1200: 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 tag is probably not where the issue was first introduced, but is likely to be as far as anyone considers backporting this fix. Fixes: 0bd3d338f61b ("staging: iio: ad2s1200: Improve readability with be16_to_cpup") Signed-off-by: Jonathan Cameron Acked-by: Nuno Sá Link: https://lore.kernel.org/r/20220508175712.647246-89-jic23@kernel.org --- diff --git a/drivers/iio/resolver/ad2s1200.c b/drivers/iio/resolver/ad2s1200.c index 9746bd9356285..9d95241bdf8f2 100644 --- a/drivers/iio/resolver/ad2s1200.c +++ b/drivers/iio/resolver/ad2s1200.c @@ -41,7 +41,7 @@ struct ad2s1200_state { struct spi_device *sdev; struct gpio_desc *sample; struct gpio_desc *rdvel; - __be16 rx ____cacheline_aligned; + __be16 rx __aligned(IIO_DMA_MINALIGN); }; static int ad2s1200_read_raw(struct iio_dev *indio_dev,