ACPI / hotplug / PCI: Drop flags field from struct acpiphp_bridge

The only bridge flag used by the ACPI-based PCI hotplug (ACPIPHP)
code is BRIDGE_HAS_EJ0, but it is only used by the event handling
function hotplug_event() and if that flag is set, the corresponding
function flag FUNC_HAS_EJ0 is set as well, so that bridge flag is
redundant.

For this reason, drop BRIDGE_HAS_EJ0 and all code referring to it
and since it is the only bridge flag defined, drop the flags field
from struct acpiphp_bridge entirely.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>

drivers/pci/hotplug/acpiphp.h

@@ -83,8 +83,6 @@ struct acpiphp_bridge {
 
 	int nr_slots;
 
-	u32 flags;
-
 	/* This bus (host bridge) or Secondary bus (PCI-to-PCI bridge) */
 	struct pci_bus *pci_bus;
 
@@ -154,9 +152,6 @@ struct acpiphp_attention_info
 /* ACPI _STA method value (ignore bit 4; battery present) */
 #define ACPI_STA_ALL			(0x0000000f)
 
-/* bridge flags */
-#define BRIDGE_HAS_EJ0		(0x00000001)
-
 /* slot flags */
 
 #define SLOT_POWEREDON		(0x00000001)

drivers/pci/hotplug/acpiphp_glue.c

@@ -986,9 +986,6 @@ static void hotplug_event(acpi_handle handle, u32 type, void *data)
 	case ACPI_NOTIFY_EJECT_REQUEST:
 		/* request device eject */
 		dbg("%s: Device eject notify on %s\n", __func__, objname);
-		if (bridge && !(bridge->flags & BRIDGE_HAS_EJ0))
-			break;
-
 		if (!(acpiphp_disable_slot(func->slot)))
 			acpiphp_eject_slot(func->slot);
 
@@ -1125,12 +1122,6 @@ void acpiphp_enumerate_slots(struct pci_bus *bus)
 		mutex_unlock(&acpiphp_context_lock);
 	}
 
-	status = acpi_get_handle(bridge->handle, "_EJ0", &handle);
-	if (ACPI_SUCCESS(status)) {
-		dbg("found ejectable p2p bridge\n");
-		bridge->flags |= BRIDGE_HAS_EJ0;
-	}
-
 	/* must be added to the list prior to calling register_slot */
 	mutex_lock(&bridge_mutex);
 	list_add(&bridge->list, &bridge_list);