[PATCH] drm/sti: Fix ddc_adapt reference leak in sti_hdmi_probe()

[Wentao Liang]

When component_add() fails, sti_hdmi_probe() returns the error without
going through the release_adapter label, leaking the reference to the
DDC i2c adapter that only sti_hdmi_remove() would otherwise drop.
Route the failure through the label instead.

Fixes: 4d5821a71ce9 ("drm/sti: hdmi use of_get_i2c_adapter_by_node interface")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Wentao Liang <vulab@xxxxxxxxxxx>
---
 drivers/gpu/drm/sti/sti_hdmi.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/sti/sti_hdmi.c b/drivers/gpu/drm/sti/sti_hdmi.c
index f8222e60b1e0..ed5646545f84 100644
--- a/drivers/gpu/drm/sti/sti_hdmi.c
+++ b/drivers/gpu/drm/sti/sti_hdmi.c
@@ -1460,7 +1460,11 @@ static int sti_hdmi_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, hdmi);
 
 	drm_bridge_add(&hdmi->bridge);
-	return component_add(&pdev->dev, &sti_hdmi_ops);
+	ret = component_add(&pdev->dev, &sti_hdmi_ops);
+	if (ret)
+		goto release_adapter;
+
+	return 0;
 
  release_adapter:
 	i2c_put_adapter(hdmi->ddc_adapt);
-- 
2.34.1