drm/bridge: put the bridge returned by drm_bridge_get_next_bridge()

The bridge returned by drm_bridge_get_next_bridge() is refcounted. Put it
when done. We need to ensure it is not put before either next_bridge or
next_bridge_state is in use, thus for simplicity use a cleanup action.

Reviewed-by: Maxime Ripard <mripard@kernel.org>
Link: https://lore.kernel.org/r/20250801-drm-bridge-alloc-getput-drm_bridge_get_next_bridge-v2-8-888912b0be13@bootlin.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>

diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
index 18c0e8b5511df8fd37f085a9d5d473916744fab1..5f265e8b4d49a38233c14d8e13c915318e9ac3ee 100644 (file)
--- a/drivers/gpu/drm/drm_bridge.c
+++ b/drivers/gpu/drm/drm_bridge.c
@@ -1121,7 +1121,6 @@ drm_atomic_bridge_propagate_bus_flags(struct drm_bridge *bridge,
                                      struct drm_atomic_state *state)
 {
        struct drm_bridge_state *bridge_state, *next_bridge_state;
-       struct drm_bridge *next_bridge;
        u32 output_flags = 0;
 
        bridge_state = drm_atomic_get_new_bridge_state(state, bridge);
@@ -1130,7 +1129,7 @@ drm_atomic_bridge_propagate_bus_flags(struct drm_bridge *bridge,
        if (!bridge_state)
                return;
 
-       next_bridge = drm_bridge_get_next_bridge(bridge);
+       struct drm_bridge *next_bridge __free(drm_bridge_put) = drm_bridge_get_next_bridge(bridge);
 
        /*
         * Let's try to apply the most common case here, that is, propagate