PCI: Rename _DSM constants to align with spec

Rename PCI-related _DSM constants to align them with the PCI Firmware Spec,
r3.2, sec 4.6.  No functional change intended.

Link: https://lore.kernel.org/r/20200526213905.2479381-1-kw@linux.com
Signed-off-by: Krzysztof Wilczyński <kw@linux.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

drivers/acpi/pci_root.c

@@ -938,7 +938,7 @@ struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root,
 	 * assignments made by firmware for this host bridge.
 	 */
 	obj = acpi_evaluate_dsm(ACPI_HANDLE(bus->bridge), &pci_acpi_dsm_guid, 1,
-	                        IGNORE_PCI_BOOT_CONFIG_DSM, NULL);
+				DSM_PCI_PRESERVE_BOOT_CONFIG, NULL);
 	if (obj && obj->type == ACPI_TYPE_INTEGER && obj->integer.value == 0)
 		host_bridge->preserve_config = 1;
 	ACPI_FREE(obj);

drivers/pci/pci-acpi.c

@@ -1128,7 +1128,7 @@ void acpi_pci_add_bus(struct pci_bus *bus)
 		return;
 
 	obj = acpi_evaluate_dsm(ACPI_HANDLE(bus->bridge), &pci_acpi_dsm_guid, 3,
-				RESET_DELAY_DSM, NULL);
+				DSM_PCI_POWER_ON_RESET_DELAY, NULL);
 	if (!obj)
 		return;
 
@@ -1193,7 +1193,7 @@ static void pci_acpi_optimize_delay(struct pci_dev *pdev,
 		pdev->d3cold_delay = 0;
 
 	obj = acpi_evaluate_dsm(handle, &pci_acpi_dsm_guid, 3,
-				FUNCTION_DELAY_DSM, NULL);
+				DSM_PCI_DEVICE_READINESS_DURATIONS, NULL);
 	if (!obj)
 		return;
 

drivers/pci/pci-label.c

@@ -178,7 +178,7 @@ static int dsm_get_label(struct device *dev, char *buf,
 		return -1;
 
 	obj = acpi_evaluate_dsm(handle, &pci_acpi_dsm_guid, 0x2,
-				DEVICE_LABEL_DSM, NULL);
+				DSM_PCI_DEVICE_NAME, NULL);
 	if (!obj)
 		return -1;
 
@@ -218,7 +218,7 @@ static bool device_has_dsm(struct device *dev)
 		return false;
 
 	return !!acpi_check_dsm(handle, &pci_acpi_dsm_guid, 0x2,
-				1 << DEVICE_LABEL_DSM);
+				1 << DSM_PCI_DEVICE_NAME);
 }
 
 static umode_t acpi_index_string_exist(struct kobject *kobj,

include/linux/pci-acpi.h

@@ -107,10 +107,12 @@ static inline void acpiphp_check_host_bridge(struct acpi_device *adev) { }
 #endif
 
 extern const guid_t pci_acpi_dsm_guid;
-#define IGNORE_PCI_BOOT_CONFIG_DSM	0x05
+
-#define DEVICE_LABEL_DSM		0x07
+/* _DSM Definitions for PCI */
-#define RESET_DELAY_DSM			0x08
+#define DSM_PCI_PRESERVE_BOOT_CONFIG		0x05
-#define FUNCTION_DELAY_DSM		0x09
+#define DSM_PCI_DEVICE_NAME			0x07
+#define DSM_PCI_POWER_ON_RESET_DELAY		0x08
+#define DSM_PCI_DEVICE_READINESS_DURATIONS	0x09
 
 #ifdef CONFIG_PCIE_EDR
 void pci_acpi_add_edr_notifier(struct pci_dev *pdev);