Add a max_dev field to BusClass to specify the maximum amount of devices allowed
on the bus (has no effect if max_dev=0)
Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
*/
char *(*get_fw_dev_path)(DeviceState *dev);
int (*reset)(BusState *bus);
+ /* maximum devices allowed on the bus, 0: no limit. */
+ int max_dev;
};
typedef struct BusChild {
static BusState *qbus_find_recursive(BusState *bus, const char *name,
const char *bus_typename)
{
+ BusClass *bus_class = BUS_GET_CLASS(bus);
BusChild *kid;
BusState *child, *ret;
int match = 1;
if (bus_typename && !object_dynamic_cast(OBJECT(bus), bus_typename)) {
match = 0;
}
+ if ((bus_class->max_dev != 0) && (bus_class->max_dev <= bus->max_index)) {
+ if (name != NULL) {
+ /* bus was explicitly specified: return an error. */
+ qerror_report(ERROR_CLASS_GENERIC_ERROR, "Bus '%s' is full",
+ bus->name);
+ return NULL;
+ } else {
+ /* bus was not specified: try to find another one. */
+ match = 0;
+ }
+ }
if (match) {
return bus;
}