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From:   Jernej Skrabec <jernej.skrabec@siol.net>
To:     maxime.ripard@bootlin.com, wens@csie.org, robh+dt@kernel.org
Cc:     airlied@linux.ie, gustavo@padovan.org,
        maarten.lankhorst@linux.intel.com, seanpaul@chromium.org,
        mark.rutland@arm.com, dri-devel@lists.freedesktop.org,
        devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org,
        linux-sunxi@googlegroups.com
Subject: [PATCH v2 06/27] drm/sun4i: Fix releasing node when enumerating enpoints
Date:   Tue, 12 Jun 2018 22:00:15 +0200
Message-Id: <20180612200036.21483-7-jernej.skrabec@siol.net>
In-Reply-To: <20180612200036.21483-1-jernej.skrabec@siol.net>
References: <20180612200036.21483-1-jernej.skrabec@siol.net>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

sun4i_drv_add_endpoints() has a memory leak since it uses of_node_put()
when remote is equal to NULL and does nothing when remote has a valid
pointer.

Invert the logic to fix memory leak.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
 drivers/gpu/drm/sun4i/sun4i_drv.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c b/drivers/gpu/drm/sun4i/sun4i_drv.c
index 50d19605c38f..e15fa2389e3f 100644
--- a/drivers/gpu/drm/sun4i/sun4i_drv.c
+++ b/drivers/gpu/drm/sun4i/sun4i_drv.c
@@ -283,7 +283,6 @@ static int sun4i_drv_add_endpoints(struct device *dev,
 		remote = of_graph_get_remote_port_parent(ep);
 		if (!remote) {
 			DRM_DEBUG_DRIVER("Error retrieving the output node\n");
-			of_node_put(remote);
 			continue;
 		}
 
@@ -297,11 +296,13 @@ static int sun4i_drv_add_endpoints(struct device *dev,
 
 			if (of_graph_parse_endpoint(ep, &endpoint)) {
 				DRM_DEBUG_DRIVER("Couldn't parse endpoint\n");
+				of_node_put(remote);
 				continue;
 			}
 
 			if (!endpoint.id) {
 				DRM_DEBUG_DRIVER("Endpoint is our panel... skipping\n");
+				of_node_put(remote);
 				continue;
 			}
 		}
-- 
2.17.1