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| author |   Robin Murphy <robin.murphy@arm.com> | 2019-07-03 18:23:01 +0100 |
|---|---|---|
| committer |   Rob Herring <robh@kernel.org> | 2019-10-08 13:50:22 -0500 |
| commit | 862ab5578f754117742c8b8c8e5ddf98bdb190ba (patch) | |
| tree | 24dcec3ad07c3c192ee710f2fd33173c22573363 /drivers/of | |
| parent | of: address: Report of_dma_get_range() errors meaningfully (diff) | |
| download | linux-dev-862ab5578f754117742c8b8c8e5ddf98bdb190ba.tar.xz linux-dev-862ab5578f754117742c8b8c8e5ddf98bdb190ba.zip | |
of/address: Introduce of_get_next_dma_parent() helper
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>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Rob Herring <robh@kernel.org>
Diffstat (limited to 'drivers/of')
| -rw-r--r-- | drivers/of/address.c | 10 |
1 files changed, 10 insertions, 0 deletions
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; |