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drm/meson: Fix refcount bugs in meson_vpu_has_available_connectors()

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[ Upstream commit 91b3c8dbe898df158fd2a84675f3a284ff6666f7 ]

In this function, there are two refcount leak bugs:
(1) when breaking out of for_each_endpoint_of_node(), we need call
the of_node_put() for the 'ep';
(2) we should call of_node_put() for the reference returned by
of_graph_get_remote_port() when it is not used anymore.

Fixes: bbbe775ec5 ("drm: Add support for Amlogic Meson Graphic Controller")
Signed-off-by: Liang He <windhl@126.com>
Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220726010722.1319416-1-windhl@126.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Liang He 2022-07-26 09:07:22 +08:00 committed by Greg Kroah-Hartman
parent d0c4307aea
commit d58ef25678
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/meson/meson_drv.c
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@ -124,8 +124,11 @@ static bool meson_vpu_has_available_connectors(struct device *dev)
for_each_endpoint_of_node(dev->of_node, ep) {
/* If the endpoint node exists, consider it enabled */
remote = of_graph_get_remote_port(ep);
if (remote)
if (remote) {
of_node_put(remote);
of_node_put(ep);
return true;
}
}
return false;