diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 861341b48851..4c27e8916b04 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -2355,8 +2355,12 @@ static int its_setup_baser(struct its_node *its, struct its_baser *baser,
 	tmp = baser->val;
 
 	if (of_machine_is_compatible("rockchip,rk3568") ||
-	    of_machine_is_compatible("rockchip,rk3566"))
-		tmp &= ~GITS_BASER_SHAREABILITY_MASK;
+	    of_machine_is_compatible("rockchip,rk3566")) {
+		if (tmp & GITS_BASER_SHAREABILITY_MASK)
+			tmp &= ~GITS_BASER_SHAREABILITY_MASK;
+		else
+			gic_flush_dcache_to_poc(base, PAGE_ORDER_TO_SIZE(order));
+	}
 
 	if ((val ^ tmp) & GITS_BASER_SHAREABILITY_MASK) {
 		/*