[PATCH 5.19 0311/1157] drm/meson: Fix refcount leak in meson_encoder_hdmi_init

Greg Kroah-Hartman
2022-08-15T23:28:25Z

From: Miaoqian Lin <linmq006@gmail.com>

[ Upstream commit 7381076809586528e2a812a709e2758916318a99 ]

of_find_device_by_node() takes reference, we should use put_device()
to release it when not need anymore.
Add missing put_device() in error path to avoid refcount
leak.

Fixes: 0af5e0b41110 ("drm/meson: encoder_hdmi: switch to bridge DRM_BRIDGE_ATTACH_NO_CONNECTOR")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220511054052.51981-1-linmq006@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/meson/meson_encoder_hdmi.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/meson/meson_encoder_hdmi.c b/drivers/gpu/drm/meson/meson_encoder_hdmi.c
index 5e306de6f485..de87f02cd388 100644
--- a/drivers/gpu/drm/meson/meson_encoder_hdmi.c
+++ b/drivers/gpu/drm/meson/meson_encoder_hdmi.c
@@ -435,8 +435,10 @@ int meson_encoder_hdmi_init(struct meson_drm *priv)
cec_fill_conn_info_from_drm(&conn_info, meson_encoder_hdmi->connector);

notifier = cec_notifier_conn_register(&pdev->dev, NULL, &conn_info);
- if (!notifier)
+ if (!notifier) {
+ put_device(&pdev->dev);
return -ENOMEM;
+ }

meson_encoder_hdmi->cec_notifier = notifier;
}
--
2.35.1