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of: fix reference counting in of_graph_get_endpoint_by_regs 

The called of_graph_get_next_endpoint() already decrements the refcount
of the prev node, so it is wrong to do it again in the calling function.

Use the for_each_endpoint_of_node() helper to interate through the
endpoint OF nodes, which already does the right thing and simplifies
the code a bit.

Fixes: 8ccd0d0ca0
(of: add helper for getting endpoint node of specific identifiers)
Cc: stable@vger.kernel.org
Reported-by: David Jander <david@protonic.nl>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Lucas Stach 2016-08-15 14:58:43 +02:00 committed by Rob Herring
parent fc520f8b4f
commit 34276bb062
1 changed files with 2 additions and 9 deletions
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11
drivers/of/base.c
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@ -2342,20 +2342,13 @@ struct device_node *of_graph_get_endpoint_by_regs(
const struct device_node *parent, int port_reg, int reg)
{
struct of_endpoint endpoint;
struct device_node *node, *prev_node = NULL;
while (1) {
node = of_graph_get_next_endpoint(parent, prev_node);
of_node_put(prev_node);
if (!node)
break;
struct device_node *node = NULL;
for_each_endpoint_of_node(parent, node) {
of_graph_parse_endpoint(node, &endpoint);
if (((port_reg == -1) || (endpoint.port == port_reg)) &&
((reg == -1) || (endpoint.id == reg)))
return node;
prev_node = node;
}
return NULL;