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authorLucas Stach <l.stach@pengutronix.de>2016-08-15 14:58:43 +0200
committerRob Herring <robh@kernel.org>2016-08-15 11:15:05 -0500
commit34276bb062b8449b3b0a208c9b848a1a27920075 (patch)
tree915da4e3ee4627a14ea40e065e2458edf87b20c7 /drivers/of
parentfc520f8b4fa35ceb36f0ad031c1a297968788236 (diff)
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: 8ccd0d0ca041 (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>
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/base.c11
1 files changed, 2 insertions, 9 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c
index cb255a07baa0..3ce69536a7b3 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -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;