PCI/PM: Rename pci_wakeup_bus() to pci_resume_bus()

A "wakeup" is a signal from a device telling the system that the device or
the whole system should be awakened and made active. PCI devices are made
active by "resuming" them.

pci_wakeup_bus() is not involved with the wakeup signal; it *resumes*
devices on a bus (possibly in response to a wakeup signal, but that's at a
higher level).

Rename pci_wakeup_bus() to pci_resume_bus() to better reflect what it does.
No functional change intended.

[bhelgaas: commit log, reorder before removal of pci_wakeup_event()]
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mika Westerberg <[e-mail]>
Signed-off-by: Bjorn Helgaas <[e-mail]>
Reviewed-by: Rafael J. Wysocki <[e-mail]>

drivers/gpu/vga/vga_switcheroo.c

···
 	mutex_lock(&vgasr_mutex);
 	vga_switcheroo_power_switch(pdev, VGA_SWITCHEROO_ON);
 	mutex_unlock(&vgasr_mutex);
-	pci_wakeup_bus(pdev->bus);
+	pci_resume_bus(pdev->bus);
 	ret = dev->bus->pm->runtime_resume(dev);
 	if (ret)
 		return ret;

drivers/pci/pci.c

···
 }
 EXPORT_SYMBOL_GPL(pci_platform_power_transition);
 
-/**
- * pci_wakeup - Wake up a PCI device
- * @pci_dev: Device to handle.
- * @ign: ignored parameter
- */
-static int pci_wakeup(struct pci_dev *pci_dev, void *ign)
+static int pci_resume_one(struct pci_dev *pci_dev, void *ign)
 {
 	pci_wakeup_event(pci_dev);
 	pm_request_resume(&pci_dev->dev);
···
 }
 
 /**
- * pci_wakeup_bus - Walk given bus and wake up devices on it
+ * pci_resume_bus - Walk given bus and runtime resume devices on it
  * @bus: Top bus of the subtree to walk.
  */
-void pci_wakeup_bus(struct pci_bus *bus)
+void pci_resume_bus(struct pci_bus *bus)
 {
 	if (bus)
-		pci_walk_bus(bus, pci_wakeup, NULL);
+		pci_walk_bus(bus, pci_resume_one, NULL);
 }
 
 static int pci_dev_wait(struct pci_dev *dev, char *reset_type, int timeout)
···
 		 * may be powered on into D0uninitialized state, resume them to
 		 * give them a chance to suspend again
 		 */
-		pci_wakeup_bus(dev->subordinate);
+		pci_resume_bus(dev->subordinate);
 	}
 
 	return pci_raw_set_power_state(dev, PCI_D0);

include/linux/pci.h

···
 void pci_d3cold_enable(struct pci_dev *dev);
 void pci_d3cold_disable(struct pci_dev *dev);
 bool pcie_relaxed_ordering_enabled(struct pci_dev *dev);
-void pci_wakeup_bus(struct pci_bus *bus);
+void pci_resume_bus(struct pci_bus *bus);
 void pci_bus_set_current_state(struct pci_bus *bus, pci_power_t state);
 
 /* For use by arch with custom probe code */