diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/device.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/device.h b/include/linux/device.h index bff46ce3bc3b..1e05911325f0 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -78,6 +78,17 @@ extern void bus_remove_file(struct bus_type *, struct bus_attribute *); * -EPROBE_DEFER it will queue the device for deferred probing. * @uevent: Called when a device is added, removed, or a few other things * that generate uevents to add the environment variables. + * @add_links: Called, perhaps multiple times per device, after a device is + * added to this bus. The function is expected to create device + * links to all the suppliers of the input device that are + * available at the time this function is called. As in, the + * function should NOT stop at the first failed device link if + * other unlinked supplier devices are present in the system. + * + * Return 0 if device links have been successfully created to all + * the suppliers of this device. Return an error if some of the + * suppliers are not yet available and this function needs to be + * reattempted in the future. * @probe: Called when a new device or driver add to this bus, and callback * the specific driver's probe to initial the matched device. * @remove: Called when a device removed from this bus. @@ -122,6 +133,7 @@ struct bus_type { int (*match)(struct device *dev, struct device_driver *drv); int (*uevent)(struct device *dev, struct kobj_uevent_env *env); + int (*add_links)(struct device *dev); int (*probe)(struct device *dev); int (*remove)(struct device *dev); void (*shutdown)(struct device *dev); @@ -1128,11 +1140,13 @@ enum dl_dev_state { * struct dev_links_info - Device data related to device links. * @suppliers: List of links to supplier devices. * @consumers: List of links to consumer devices. + * @needs_suppliers: Hook to global list of devices waiting for suppliers. * @status: Driver status information. */ struct dev_links_info { struct list_head suppliers; struct list_head consumers; + struct list_head needs_suppliers; enum dl_dev_state status; }; |