drivers/pci/pci.c: fix warning when CONFIG_PCI_ASSIGN_ALL_BUSES=n

pci/pci.c:415:34: warning: variable ‘res’ set but not used [-Wunused-but-set-variable]
  415 |       FAR struct pci_resource_s *res;
      |                                  ^~~
pci/pci.c: In function ‘pci_scan_bus’:
pci/pci.c:663:32: warning: unused variable ‘ctrl’ [-Wunused-variable]
  663 |   FAR struct pci_controller_s *ctrl = bus->ctrl;

Signed-off-by: Bowen Wang <[email protected]>

Author: CV-Bowen

drivers/pci/pci.c

@@ -689,6 +689,8 @@ static void pci_setup_device(FAR struct pci_device_s *dev, int max_bar,
   pci_read_config_byte(dev, PCI_COMMAND, &cmd);
   pci_write_config_byte(dev, PCI_COMMAND,
                         cmd & ~PCI_COMMAND_IO & ~PCI_COMMAND_MEMORY);
+#else
+  uint32_t tmp;
 #endif
 
   for (bar = 0; bar < max_bar; bar++)
@@ -762,8 +764,6 @@ static void pci_setup_device(FAR struct pci_device_s *dev, int max_bar,
       res->start += size;
 #else
       UNUSED(res);
-      uint32_t tmp;
-
       pci_read_config_dword(dev, base_address_0, &tmp);
       if (mask & PCI_BASE_ADDRESS_SPACE_IO)
         {
@@ -1040,7 +1040,7 @@ static void pci_scan_bus(FAR struct pci_bus_s *bus)
           child_bus->parent_bus = bus;
 
 #ifdef CONFIG_PCI_ASSIGN_ALL_BUSES
-          child_bus->number = ctrl->busno++;
+          child_bus->number = bus->ctrl->busno++;
 #endif
 
           list_add_tail(&bus->children, &child_bus->node);