mfd: core: Copy DMA mask and params from parent

The child device intends to perform DMA operations then it needs a dma
mask and params set. This patches copies them from the parent device.

Signed-off-by: Benedikt Spranger <b.spranger@linutronix.de>
Signed-off-by: Holger Dengler <dengler@linutronix.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
index 7604f4e5df40a10e03693407da38cb82ea3de14b..f421586f29fb09b02644ee8b05aa6777fb353835 100644 (file)
--- a/drivers/mfd/mfd-core.c
+++ b/drivers/mfd/mfd-core.c
@@ -96,6 +96,8 @@ static int mfd_add_device(struct device *parent, int id,
 
        pdev->dev.parent = parent;
        pdev->dev.type = &mfd_dev_type;
+       pdev->dev.dma_mask = parent->dma_mask;
+       pdev->dev.dma_parms = parent->dma_parms;
 
        if (parent->of_node && cell->of_compatible) {
                for_each_child_of_node(parent->of_node, np) {