target/linux/bcm27xx/patches-5.4/950-0435-of-address-Introduce-of_get_next_dma_parent-helper.patch

   1 From 25ab98ceb9844642c994b5766de1033552d1aef2 Mon Sep 17 00:00:00 2001
   2 From: Robin Murphy <robin.murphy@arm.com>
   3 Date: Wed, 3 Jul 2019 18:23:01 +0100
   4 Subject: [PATCH] of/address: Introduce of_get_next_dma_parent() helper
   5
   6 commit 862ab5578f754117742c8b8c8e5ddf98bdb190ba upstream.
   7
   8 Add of_get_next_dma_parent() helper which is similar to
   9 __of_get_dma_parent(), but can be used in iterators and decrements the
  10 ref count on the prior parent.
  11
  12 Signed-off-by: Robin Murphy <robin.murphy@arm.com>
  13 Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
  14 Tested-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
  15 Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
  16 Signed-off-by: Rob Herring <robh@kernel.org>
  17 ---
  18  drivers/of/address.c | 10 ++++++++++
  19  1 file changed, 10 insertions(+)
  20
  21 --- a/drivers/of/address.c
  22 +++ b/drivers/of/address.c
  23 @@ -695,6 +695,16 @@ static struct device_node *__of_get_dma_
  24         return of_node_get(args.np);
  25  }
  26
  27 +static struct device_node *of_get_next_dma_parent(struct device_node *np)
  28 +{
  29 +       struct device_node *parent;
  30 +
  31 +       parent = __of_get_dma_parent(np);
  32 +       of_node_put(np);
  33 +
  34 +       return parent;
  35 +}
  36 +
  37  u64 of_translate_dma_address(struct device_node *dev, const __be32 *in_addr)
  38  {
  39         struct device_node *host;