Check the validity of post_disable/pre_enable in bridge->funcs before call them.
Signed-off-by: Chris Zhong zyw@rock-chips.com ---
Changes in v5: None Changes in v4: None Changes in v3: None Changes in v2: None
drivers/gpu/drm/drm_bridge.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c index 6b8f721..8f29330 100644 --- a/drivers/gpu/drm/drm_bridge.c +++ b/drivers/gpu/drm/drm_bridge.c @@ -223,7 +223,8 @@ void drm_bridge_post_disable(struct drm_bridge *bridge) if (!bridge) return;
- bridge->funcs->post_disable(bridge); + if (bridge->funcs->post_disable) + bridge->funcs->post_disable(bridge);
drm_bridge_post_disable(bridge->next); } @@ -273,7 +274,8 @@ void drm_bridge_pre_enable(struct drm_bridge *bridge)
drm_bridge_pre_enable(bridge->next);
- bridge->funcs->pre_enable(bridge); + if (bridge->funcs->pre_enable) + bridge->funcs->pre_enable(bridge); } EXPORT_SYMBOL(drm_bridge_pre_enable);