drm/bridge: get/put the bridge reference in drm_bridge_add/remove()

drm_bridge_add() adds the bridge to the global bridge_list, so take a
reference for that. Vice versa in drm_bridge_remove().

Reviewed-by: Maxime Ripard <mripard@kernel.org>
Link: https://lore.kernel.org/r/20250620-drm-bridge-alloc-getput-drm-bridge-c-v9-1-ca53372c9a84@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 d6ce7b4c019f415400bab8aa3d032638cba6cdc5..fa2b2457b16e145e3ace70c53984937096d310d0 100644 (file)
--- a/drivers/gpu/drm/drm_bridge.c
+++ b/drivers/gpu/drm/drm_bridge.c
@@ -295,6 +295,8 @@ EXPORT_SYMBOL(__devm_drm_bridge_alloc);
  */
 void drm_bridge_add(struct drm_bridge *bridge)
 {
+       drm_bridge_get(bridge);
+
        mutex_init(&bridge->hpd_mutex);
 
        if (bridge->ops & DRM_BRIDGE_OP_HDMI)
@@ -342,6 +344,8 @@ void drm_bridge_remove(struct drm_bridge *bridge)
        mutex_unlock(&bridge_lock);
 
        mutex_destroy(&bridge->hpd_mutex);
+
+       drm_bridge_put(bridge);
 }
 EXPORT_SYMBOL(drm_bridge_remove);