Check the validity of post_disable/pre_enable in bridge->funcs before
call them.
Signed-off-by: Chris Zhong <z...@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);
--
2.6.3
--
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