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40 lines
1.2 KiB
Diff
40 lines
1.2 KiB
Diff
From 25ab98ceb9844642c994b5766de1033552d1aef2 Mon Sep 17 00:00:00 2001
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From: Robin Murphy <robin.murphy@arm.com>
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Date: Wed, 3 Jul 2019 18:23:01 +0100
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Subject: [PATCH] of/address: Introduce of_get_next_dma_parent() helper
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commit 862ab5578f754117742c8b8c8e5ddf98bdb190ba upstream.
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Add of_get_next_dma_parent() helper which is similar to
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__of_get_dma_parent(), but can be used in iterators and decrements the
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ref count on the prior parent.
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Signed-off-by: Robin Murphy <robin.murphy@arm.com>
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Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Tested-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
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Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
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Signed-off-by: Rob Herring <robh@kernel.org>
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---
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drivers/of/address.c | 10 ++++++++++
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1 file changed, 10 insertions(+)
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--- a/drivers/of/address.c
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+++ b/drivers/of/address.c
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@@ -695,6 +695,16 @@ static struct device_node *__of_get_dma_
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return of_node_get(args.np);
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}
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+static struct device_node *of_get_next_dma_parent(struct device_node *np)
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+{
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+ struct device_node *parent;
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+
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+ parent = __of_get_dma_parent(np);
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+ of_node_put(np);
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+
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+ return parent;
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+}
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+
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u64 of_translate_dma_address(struct device_node *dev, const __be32 *in_addr)
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{
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struct device_node *host;
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