From 30be3031087139061de4421bf52015931eaab569 Mon Sep 17 00:00:00 2001 From: Enric Balletbo i Serra Date: Thu, 16 Apr 2020 23:06:54 +0200 Subject: drm/bridge: panel: Return always an error pointer in drm_panel_bridge_add() Since commit 89958b7cd955 ("drm/bridge: panel: Infer connector type from panel by default"), drm_panel_bridge_add() and their variants can return NULL and an error pointer. This is fine but none of the actual users of the API are checking for the NULL value. Instead of change all the users, seems reasonable to return an error pointer instead. So change the returned value for those functions when the connector type is unknown. Suggested-by: Laurent Pinchart Signed-off-by: Enric Balletbo i Serra Reviewed-by: Laurent Pinchart Signed-off-by: Sam Ravnborg Link: https://patchwork.freedesktop.org/patch/msgid/20200416210654.2468805-1-enric.balletbo@collabora.com --- drivers/gpu/drm/bridge/panel.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers/gpu/drm/bridge') diff --git a/drivers/gpu/drm/bridge/panel.c b/drivers/gpu/drm/bridge/panel.c index e933f1c47f5d..1e63ed6b18aa 100644 --- a/drivers/gpu/drm/bridge/panel.c +++ b/drivers/gpu/drm/bridge/panel.c @@ -166,7 +166,7 @@ static const struct drm_bridge_funcs panel_bridge_bridge_funcs = { * * The connector type is set to @panel->connector_type, which must be set to a * known type. Calling this function with a panel whose connector type is - * DRM_MODE_CONNECTOR_Unknown will return NULL. + * DRM_MODE_CONNECTOR_Unknown will return ERR_PTR(-EINVAL). * * See devm_drm_panel_bridge_add() for an automatically managed version of this * function. @@ -174,7 +174,7 @@ static const struct drm_bridge_funcs panel_bridge_bridge_funcs = { struct drm_bridge *drm_panel_bridge_add(struct drm_panel *panel) { if (WARN_ON(panel->connector_type == DRM_MODE_CONNECTOR_Unknown)) - return NULL; + return ERR_PTR(-EINVAL); return drm_panel_bridge_add_typed(panel, panel->connector_type); } @@ -265,7 +265,7 @@ struct drm_bridge *devm_drm_panel_bridge_add(struct device *dev, struct drm_panel *panel) { if (WARN_ON(panel->connector_type == DRM_MODE_CONNECTOR_Unknown)) - return NULL; + return ERR_PTR(-EINVAL); return devm_drm_panel_bridge_add_typed(dev, panel, panel->connector_type); -- cgit v1.2.3