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Date: Mon, 15 Aug 2022 20:00:39 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Jonathan Cameron <Jonathan.Cameron@...wei.com>, Antoniu Miclaus <antoniu.miclaus@...log.com>, Nuno Sá <nuno.sa@...log.com>, Sasha Levin <sashal@...nel.org> Subject: [PATCH 5.18 0640/1095] iio: dac: ad7293: Fix alignment for DMA safety From: Jonathan Cameron <Jonathan.Cameron@...wei.com> [ Upstream commit 8482468b30bdb16d4a764f995d7a63d94fa0cf40 ] ____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: 0bb12606c05f ("iio:dac:ad7293: add support for AD7293") Signed-off-by: Jonathan Cameron <Jonathan.Cameron@...wei.com> Cc: Antoniu Miclaus <antoniu.miclaus@...log.com> Acked-by: Nuno Sá <nuno.sa@...log.com> Link: https://lore.kernel.org/r/20220508175712.647246-57-jic23@kernel.org Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/iio/dac/ad7293.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/dac/ad7293.c b/drivers/iio/dac/ad7293.c index 59a38ca4c3c7..06f05750d921 100644 --- a/drivers/iio/dac/ad7293.c +++ b/drivers/iio/dac/ad7293.c @@ -144,7 +144,7 @@ struct ad7293_state { struct regulator *reg_avdd; struct regulator *reg_vdrive; u8 page_select; - u8 data[3] ____cacheline_aligned; + u8 data[3] __aligned(IIO_DMA_MINALIGN); }; static int ad7293_page_select(struct ad7293_state *st, unsigned int reg) -- 2.35.1
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