From d4712f611e6d60dd9cf09df581f5df6fad6a2207 Mon Sep 17 00:00:00 2001 From: Phil Elwell Date: Tue, 21 Jul 2020 17:34:09 +0100 Subject: [PATCH 0298/1085] staging: vchiq_arm: children inherit DMA config Although it is no longer necessary for vchiq's children to have a different DMA configuration to the parent, they do still need to explicitly to have their DMA configuration set - to be that of the parent. Signed-off-by: Phil Elwell --- .../vc04_services/interface/vchiq_arm/vchiq_arm.c | 10 ++++++++++ 1 file changed, 10 insertions(+) --- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c +++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c @@ -1869,8 +1869,18 @@ vchiq_register_child(struct platform_dev child->dev.of_node = np; + /* + * We want the dma-ranges etc to be copied from the parent VCHIQ device + * to be passed on to the children without a node of their own. + */ + if (!np) + np = pdev->dev.of_node; + of_dma_configure(&child->dev, np, true); + if (np != pdev->dev.of_node) + of_node_put(np); + return child; }