If error happens in sun8i_dw_hdmi_find_possible_crtcs(), nodes are not released with of_node_put() before returning.
Fix that by calling of_node_put() when necessary. While on it, clean up the code by using of_graph_get_remote_node() which also lowers number of cases where error handling has to be performed.
Fixes: 57e23de02f48 ("drm/sun4i: DW HDMI: Expand algorithm for possible crtcs")
Reviewed-by: Chen-Yu Tsai wens@csie.org Signed-off-by: Jernej Skrabec jernej.skrabec@siol.net --- drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c | 15 +++++---------- 1 file changed, 5 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c index 3459b9ec56c9..21dc9ebad0b4 100644 --- a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c +++ b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c @@ -53,22 +53,14 @@ static u32 sun8i_dw_hdmi_find_possible_crtcs(struct drm_device *drm, struct device_node *port, *ep, *remote, *remote_port; u32 crtcs = 0;
- port = of_graph_get_port_by_id(node, 0); - if (!port) - return 0; - - ep = of_get_next_available_child(port, NULL); - if (!ep) - return 0; - - remote = of_graph_get_remote_port_parent(ep); + remote = of_graph_get_remote_node(node, 0, -1); if (!remote) return 0;
if (sun8i_dw_hdmi_node_is_tcon_top(remote)) { port = of_graph_get_port_by_id(remote, 4); if (!port) - return 0; + goto crtcs_exit;
for_each_child_of_node(port, ep) { remote_port = of_graph_get_remote_port(ep); @@ -81,6 +73,9 @@ static u32 sun8i_dw_hdmi_find_possible_crtcs(struct drm_device *drm, crtcs = drm_of_find_possible_crtcs(drm, node); }
+crtcs_exit: + of_node_put(remote); + return crtcs; }