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Date: Mon, 15 Aug 2022 20:00:13 +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>, Akinobu Mita <akinobu.mita@...il.com>, Nuno Sá <nuno.sa@...log.com>, Sasha Levin <sashal@...nel.org> Subject: [PATCH 5.19 0657/1157] iio: adc: ti-adc0832: Fix alignment for DMA safety From: Jonathan Cameron <Jonathan.Cameron@...wei.com> [ Upstream commit 1e6bb81c23a84a078736a0f2a52bd765863e94ed ] ____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: efc945fb729c ("iio: adc: add support for ADC0831/ADC0832/ADC0834/ADC0838 chips") Signed-off-by: Jonathan Cameron <Jonathan.Cameron@...wei.com> Cc: Akinobu Mita <akinobu.mita@...il.com> Acked-by: Nuno Sá <nuno.sa@...log.com> Link: https://lore.kernel.org/r/20220508175712.647246-29-jic23@kernel.org Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/iio/adc/ti-adc0832.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/adc/ti-adc0832.c b/drivers/iio/adc/ti-adc0832.c index fb5e72600b96..b11ce555ba3b 100644 --- a/drivers/iio/adc/ti-adc0832.c +++ b/drivers/iio/adc/ti-adc0832.c @@ -36,7 +36,7 @@ struct adc0832 { */ u8 data[24] __aligned(8); - u8 tx_buf[2] ____cacheline_aligned; + u8 tx_buf[2] __aligned(IIO_DMA_MINALIGN); u8 rx_buf[2]; }; -- 2.35.1
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