drm: bridge: Detach all bridges in a chain at encoder cleanup time

Instead of detaching only the bridge directly connected to the encoder,
detach all bridges in the chain.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1481709550-29226-6-git-send-email-laurent.pinchart+renesas@ideasonboard.com

1 files changed, 10 insertions, 2 deletions

diff --git a/drivers/gpu/drm/drm_encoder.c b/drivers/gpu/drm/drm_encoder.c
index 0944f08abf58..5dde3c6b1467 100644
--- a/drivers/gpu/drm/drm_encoder.c
+++ b/drivers/gpu/drm/drm_encoder.c
@@ -159,8 +159,16 @@ void drm_encoder_cleanup(struct drm_encoder *encoder)
          * the indices on the drm_encoder after us in the encoder_list.
          */
 
-        if (encoder->bridge)
-                drm_bridge_detach(encoder->bridge);
+        if (encoder->bridge) {
+                struct drm_bridge *bridge = encoder->bridge;
+                struct drm_bridge *next;
+
+                while (bridge) {
+                        next = bridge->next;
+                        drm_bridge_detach(bridge);
+                        bridge = next;
+                }
+        }
 
         drm_mode_object_unregister(dev, &encoder->base);
         kfree(encoder->name);