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drm/bridge: make drm_panel_bridge_remove more robust 

Make sure that bridge parameter is not NULL and can be safely
cast into a panel_bridge structure.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Reviewed-by: Philippe Cornu <philippe.cornu@st.com>
Tested-by: Philippe Cornu <philippe.cornu@st.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1506936755-23625-2-git-send-email-benjamin.gaignard@linaro.org
hifive-unleashed-5.1
benjamin.gaignard@linaro.org 2017-10-02 11:32:31 +02:00 committed by Benjamin Gaignard
parent f8e0731db4
commit 6b0e284cfa
1 changed files with 9 additions and 1 deletions
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10
drivers/gpu/drm/bridge/panel.c
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@ -188,7 +188,15 @@ EXPORT_SYMBOL(drm_panel_bridge_add);
*/
void drm_panel_bridge_remove(struct drm_bridge *bridge)
{
struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge);
struct panel_bridge *panel_bridge;
if (!bridge)
return;
if (bridge->funcs != &panel_bridge_bridge_funcs)
return;
panel_bridge = drm_bridge_to_panel_bridge(bridge);
drm_bridge_remove(bridge);
devm_kfree(panel_bridge->panel->dev, bridge);