diff --git a/drivers/pci/controller/pcie-rockchip-ep.c b/drivers/pci/controller/pcie-rockchip-ep.c
index dba8bdc3fc94..d1b72b704c31 100644
--- a/drivers/pci/controller/pcie-rockchip-ep.c
+++ b/drivers/pci/controller/pcie-rockchip-ep.c
@@ -131,10 +131,8 @@ static int rockchip_pcie_ep_write_header(struct pci_epc *epc, u8 fn,
 
 	/* All functions share the same vendor ID with function 0 */
 	if (fn == 0) {
-		u32 vid_regs = (hdr->vendorid & GENMASK(15, 0)) |
-			       (hdr->subsys_vendor_id & GENMASK(31, 16)) << 16;
-
-		rockchip_pcie_write(rockchip, vid_regs,
+		rockchip_pcie_write(rockchip,
+				    hdr->vendorid | hdr->subsys_vendor_id << 16,
 				    PCIE_CORE_CONFIG_VENDOR);
 	}