# \[PATCH v2 4/7\] of/device: Set bus DMA mask as appropriate - From: Robin Murphy \ - Date: 2018-07-23 22:16:09 - List: linux-arm-kernel - Page: https://ratatoskr.run/linux-arm-kernel/2018/07/8771460 - Thread: https://ratatoskr.run/linux-arm-kernel/2018/07/8771456/t.md ```text 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. CC: Rob Herring CC: Frank Rowand Signed-off-by: Robin Murphy --- 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 ```