static void set_pci_devfn(Object *obj, Visitor *v, void *opaque, const char *name, Error **errp) { DeviceState *dev = DEVICE(obj); Property *prop = opaque; uint32_t *ptr = qdev_get_prop_ptr(dev, prop); unsigned int slot, fn, n; Error *local_err = NULL; char *str = (char *)""; if (dev->state != DEV_STATE_CREATED) { error_set(errp, QERR_PERMISSION_DENIED); return; } visit_type_str(v, &str, name, &local_err); if (local_err) { error_free(local_err); return set_int32(obj, v, opaque, name, errp); } if (sscanf(str, "%x.%x%n", &slot, &fn, &n) != 2) { fn = 0; if (sscanf(str, "%x%n", &slot, &n) != 1) { goto invalid; } } if (str[n] != '\0' || fn > 7 || slot > 31) { goto invalid; } *ptr = slot << 3 | fn; return; invalid: error_set_from_qdev_prop_error(errp, EINVAL, dev, prop, str); }