diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c
index d264b80d909de83ce4eb0502449c268571cff9fc..541e4f5afc4c86a4e87b74a016885d6231afb892 100644
--- a/drivers/gpu/drm/bridge/parade-ps8640.c
+++ b/drivers/gpu/drm/bridge/parade-ps8640.c
@@ -210,7 +210,7 @@ static ssize_t ps8640_aux_transfer_msg(struct drm_dp_aux *aux,
 	struct ps8640 *ps_bridge = aux_to_ps8640(aux);
 	struct regmap *map = ps_bridge->regmap[PAGE0_DP_CNTL];
 	struct device *dev = &ps_bridge->page[PAGE0_DP_CNTL]->dev;
-	unsigned int len = msg->size;
+	size_t len = msg->size;
 	unsigned int data;
 	unsigned int base;
 	int ret;