| 138 | * |
| 139 | */ |
| 140 | static struct bus *__alloc_bus(struct device *parent) |
| 141 | { |
| 142 | if (parent->downstream) |
| 143 | return parent->downstream; |
| 144 | |
| 145 | struct bus *bus = calloc(1, sizeof(struct bus)); |
| 146 | if (!bus) |
| 147 | die("Couldn't allocate downstream bus!\n"); |
| 148 | parent->downstream = bus; |
| 149 | bus->dev = parent; |
| 150 | |
| 151 | return bus; |
| 152 | } |
| 153 | |
| 154 | struct bus *alloc_bus(struct device *parent) |
| 155 | { |