diff --git a/drivers/firmware/imx/imx-scu.c b/drivers/firmware/imx/imx-scu.c
index 15d8d9cc900d..2292b84868f7 100644
--- a/drivers/firmware/imx/imx-scu.c
+++ b/drivers/firmware/imx/imx-scu.c
@@ -166,6 +166,7 @@ int imx_scu_call_rpc(struct imx_sc_ipc *sc_ipc, void *msg, bool have_resp)
 
 	sc_ipc->msg = msg;
 	sc_ipc->count = 0;
+	sc_ipc->rx_size = 0;
 	ret = imx_scu_ipc_write(sc_ipc, msg);
 	if (ret < 0) {
 		dev_err(sc_ipc->dev, "RPC send msg failed: %d\n", ret);