diff --git a/drivers/pci/controller/pcie-rockchip-host.c b/drivers/pci/controller/pcie-rockchip-host.c
index d9b63bfa5dd7..debd4208b4c3 100644
--- a/drivers/pci/controller/pcie-rockchip-host.c
+++ b/drivers/pci/controller/pcie-rockchip-host.c
@@ -797,7 +797,7 @@ static int rockchip_pcie_cfg_atu(struct rockchip_pcie *rockchip)
  struct device *dev = rockchip->dev;
  struct pci_host_bridge *bridge = pci_host_bridge_from_priv(rockchip);
  struct resource_entry *entry;
- u64 pci_addr, size;
+ u64 pci_addr, size_mem, size_io;
  int offset;
  int err;
  int reg_no;
@@ -808,11 +808,11 @@ static int rockchip_pcie_cfg_atu(struct rockchip_pcie *rockchip)
  if (!entry)
  return -ENODEV;

- size = resource_size(entry->res);
+ size_mem = resource_size(entry->res);
  pci_addr = entry->res->start - entry->offset;
  rockchip->msg_bus_addr = pci_addr;

- for (reg_no = 0; reg_no < (size >> 20); reg_no++) {
+ for (reg_no = 0; reg_no < (size_mem >> 20); reg_no++) {
  err = rockchip_pcie_prog_ob_atu(rockchip, reg_no + 1,
  AXI_WRAPPER_MEM_WRITE,
  20 - 1,
@@ -834,11 +834,11 @@ static int rockchip_pcie_cfg_atu(struct rockchip_pcie *rockchip)
  if (!entry)
  return -ENODEV;

- size = resource_size(entry->res);
+ size_io = resource_size(entry->res);
  pci_addr = entry->res->start - entry->offset;

- offset = size >> 20;
- for (reg_no = 0; reg_no < (size >> 20); reg_no++) {
+ offset = size_mem >> 20;
+ for (reg_no = 0; reg_no < (size_io >> 20); reg_no++) {
  err = rockchip_pcie_prog_ob_atu(rockchip,
  reg_no + 1 + offset,
  AXI_WRAPPER_IO_WRITE,