Commit 6c2fb2ea authored Jul 23, 2018 by Robin Murphy Committed by Christoph Hellwig Jul 27, 2018

of/device: Set bus DMA mask as appropriate



When an explicit DMA limit is described by firmware, we need to remember
it regardless of how drivers might subsequently update their devices'
masks. The new bus_dma_mask field does that.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>

parent d74ea710

drivers/of/device.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -149,6 +149,7 @@ int of_dma_configure(struct device dev, struct device_node np, bool force_dma)
		* set by the driver.
		*/
		mask = DMA_BIT_MASK(ilog2(dma_addr + size - 1) + 1);
		dev->bus_dma_mask = mask;
		dev->coherent_dma_mask &= mask;
		*dev->dma_mask &= mask;

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