[PATCH 5.19 326/717] drm/omap: dss: Fix refcount leak bugs

Greg Kroah-Hartman
2022-10-22T08:05:24Z

From: Liang He <windhl@126.com>

[ Upstream commit 8b42057e62120813ebe9274f508fa785b7cab33a ]

In dss_init_ports() and __dss_uninit_ports(), we should call
of_node_put() for the reference returned by of_graph_get_port_by_id()
in fail path or when it is not used anymore.

Fixes: 09bffa6e5192 ("drm: omap: use common OF graph helpers")
Signed-off-by: Liang He <windhl@126.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220722144348.1306569-1-windhl@126.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/omapdrm/dss/dss.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/omapdrm/dss/dss.c b/drivers/gpu/drm/omapdrm/dss/dss.c
index 0399f3390a0a..c4febb861910 100644
--- a/drivers/gpu/drm/omapdrm/dss/dss.c
+++ b/drivers/gpu/drm/omapdrm/dss/dss.c
@@ -1176,6 +1176,7 @@ static void __dss_uninit_ports(struct dss_device *dss, unsigned int num_ports)
default:
break;
}
+ of_node_put(port);
}
}

@@ -1208,11 +1209,13 @@ static int dss_init_ports(struct dss_device *dss)
default:
break;
}
+ of_node_put(port);
}

return 0;

error:
+ of_node_put(port);
__dss_uninit_ports(dss, i);
return r;
}
--
2.35.1