s390/pci: deconfigure device on release

When zpci_release_device() is called on a zPCI function that is still
configured it would not be deconfigured. Until now this hasn't caused
any problems because zpci_zdev_put() is only ever called for devices
in Standby or Reserved. Fix it by adding sclp_pci_deconfigure() to the
switch when in Configured state.

Reviewed-by: Matthew Rosato <[e-mail]>
Signed-off-by: Niklas Schnelle <[e-mail]>
Signed-off-by: Heiko Carstens <[e-mail]>

arch/s390/pci/pci.c

···
 void zpci_release_device(struct kref *kref)
 {
 	struct zpci_dev *zdev = container_of(kref, struct zpci_dev, kref);
+	int ret;
 
 	if (zdev->zbus->bus)
 		zpci_remove_device(zdev, false);
···
 		zpci_disable_device(zdev);
 
 	switch (zdev->state) {
+	case ZPCI_FN_STATE_CONFIGURED:
+		ret = sclp_pci_deconfigure(zdev->fid);
+		zpci_dbg(3, "deconf fid:%x, rc:%d\n", zdev->fid, ret);
+		fallthrough;
 	case ZPCI_FN_STATE_STANDBY:
 		if (zdev->has_hp_slot)
 			zpci_exit_slot(zdev);