[RFC PATCH 3/4] of/device: Set bus DMA mask as appropriate
From: Robin Murphy <robin.murphy@arm.com>
Date: 2018-07-10 18:43:26
Also in:
linux-acpi, linux-arm-kernel, linux-iommu, lkml
Subsystem:
open firmware and flattened device tree, the rest · Maintainers:
Rob Herring, Saravana Kannan, Linus Torvalds
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> --- drivers/of/device.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/of/device.c b/drivers/of/device.c
index 33d85511d790..0d39633e8545 100644
--- a/drivers/of/device.c
+++ b/drivers/of/device.c@@ -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;
--
2.17.1.dirty