PCI: Remove unused variables

This fixes "set but not used" warnings found via "make W=1".

Signed-off-by: Bjorn Helgaas <[e-mail]>

drivers/pci/hotplug/pci_hotplug_core.c

···
 int __must_check pci_hp_change_slot_info(struct hotplug_slot *hotplug,
 					 struct hotplug_slot_info *info)
 {
-	struct pci_slot *slot;
 	if (!hotplug || !info)
 		return -ENODEV;
-	slot = hotplug->pci_slot;
 
 	memcpy(hotplug->info, info, sizeof(struct hotplug_slot_info));
 

drivers/pci/pcie/portdrv_pci.c

···
 					enum pci_channel_state error)
 {
 	struct aer_broadcast_data data = {error, PCI_ERS_RESULT_CAN_RECOVER};
-	int ret;
 
-	/* can not fail */
-	ret = device_for_each_child(&dev->dev, &data, error_detected_iter);
-
+	/* get true return value from &data */
+	device_for_each_child(&dev->dev, &data, error_detected_iter);
 	return data.result;
 }
 
···
 static pci_ers_result_t pcie_portdrv_mmio_enabled(struct pci_dev *dev)
 {
 	pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED;
-	int retval;
 
 	/* get true return value from &status */
-	retval = device_for_each_child(&dev->dev, &status, mmio_enabled_iter);
+	device_for_each_child(&dev->dev, &status, mmio_enabled_iter);
 	return status;
 }
 
···
 static pci_ers_result_t pcie_portdrv_slot_reset(struct pci_dev *dev)
 {
 	pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED;
-	int retval;
 
 	/* If fatal, restore cfg space for possible link reset at upstream */
 	if (dev->error_state == pci_channel_io_frozen) {
···
 	}
 
 	/* get true return value from &status */
-	retval = device_for_each_child(&dev->dev, &status, slot_reset_iter);
-
+	device_for_each_child(&dev->dev, &status, slot_reset_iter);
 	return status;
 }
 
···
 
 static void pcie_portdrv_err_resume(struct pci_dev *dev)
 {
-	int retval;
-	/* nothing to do with error value, if it ever happens */
-	retval = device_for_each_child(&dev->dev, NULL, resume_iter);
+	device_for_each_child(&dev->dev, NULL, resume_iter);
 }
 
 /*

drivers/pci/setup-res.c

···
 {
 	struct resource *res = dev->resource + resno;
 	resource_size_t align, size;
-	struct pci_bus *bus;
 	int ret;
 
 	align = pci_resource_alignment(dev, res);
···
 		return -EINVAL;
 	}
 
-	bus = dev->bus;
 	size = resource_size(res);
 	ret = _pci_assign_resource(dev, resno, size, align);