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Subject[PATCH 06/11] of/address: Introduce of_get_next_dma_parent() helper
Date
From: Robin Murphy <robin.murphy@arm.com>

Add of_get_next_dma_parent() helper which is similar to
__of_get_dma_parent(), but can be used in iterators and decrements the
ref count on the prior parent.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Rob Herring <robh@kernel.org>
---
drivers/of/address.c | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/drivers/of/address.c b/drivers/of/address.c
index 53d2656c2269..e9188c82fdae 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -695,6 +695,16 @@ static struct device_node *__of_get_dma_parent(const struct device_node *np)
return of_node_get(args.np);
}

+static struct device_node *of_get_next_dma_parent(struct device_node *np)
+{
+ struct device_node *parent;
+
+ parent = __of_get_dma_parent(np);
+ of_node_put(np);
+
+ return parent;
+}
+
u64 of_translate_dma_address(struct device_node *dev, const __be32 *in_addr)
{
struct device_node *host;
--
2.20.1
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