[PATCH 1/3] drm/bridge: Fix drm_bridge_chain_pre_enable()

[Boris Brezillon]

Stop iterating on the bridge chain when we reach the bridge element.
That's what other helpers do and should allow bridge implementations
to execute a pre_enable operation on a sub-chain.

Fixes: 05193dc38197 ("drm/bridge: Make the bridge chain a double-linked list")
Signed-off-by: Boris Brezillon <boris.brezillon at collabora.com>
---
 drivers/gpu/drm/drm_bridge.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
index c2cf0c90fa26..b3b269ec6a39 100644
--- a/drivers/gpu/drm/drm_bridge.c
+++ b/drivers/gpu/drm/drm_bridge.c
@@ -357,6 +357,9 @@ void drm_bridge_chain_pre_enable(struct drm_bridge *bridge)
 	list_for_each_entry_reverse(iter, &encoder->bridge_chain, chain_node) {
 		if (iter->funcs->pre_enable)
 			iter->funcs->pre_enable(iter);
+
+		if (iter == bridge)
+			break;
 	}
 }
 EXPORT_SYMBOL(drm_bridge_chain_pre_enable);
-- 
2.23.0