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gpu: lontium-lt9611: Fix NULL pointer dereference in lt9611_connector_init()

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[ Upstream commit ef8886f321c5dab8124b9153d25afa2a71d05323 ]

A NULL check for bridge->encoder shows that it may be NULL, but it
already been dereferenced on all paths leading to the check.
812	if (!bridge->encoder) {

Dereference the pointer bridge->encoder.
810	drm_connector_attach_encoder(&lt9611->connector, bridge->encoder);

Signed-off-by: Zeng Jingxiang <linuszeng@tencent.com>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220727073119.1578972-1-zengjx95@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Zeng Jingxiang 2022-07-27 15:31:19 +08:00 committed by Greg Kroah-Hartman
parent 5ff7bec678
commit a29f742704
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/bridge/lontium-lt9611.c
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@ -816,13 +816,14 @@ static int lt9611_connector_init(struct drm_bridge *bridge, struct lt9611 *lt961
drm_connector_helper_add(&lt9611->connector,
&lt9611_bridge_connector_helper_funcs);
drm_connector_attach_encoder(&lt9611->connector, bridge->encoder);
if (!bridge->encoder) {
DRM_ERROR("Parent encoder object not found");
return -ENODEV;
}
drm_connector_attach_encoder(&lt9611->connector, bridge->encoder);
return 0;
}