USB_ROOT_HUB_LOST_PO - Online Linux Manual PageSection : 9
Updated : June 2018
Source : Kernel Hackers Manual 2​.6​.
Note : USB Core APIs

NAMEusb_root_hub_lost_power − called by HCD if the root hub lost Vbus power

SYNOPSISvoid usb_root_hub_lost_power(struct usb_device * rhdev);

ARGUMENTSrhdev struct usb_device for the root hub

DESCRIPTIONThe USB host controller driver calls this function when its root hub is resumed and Vbus power has been interrupted or the controller has been reset​. The routine marks rhdev as having lost power​. When the hub driver is resumed it will take notice and carry out power−session recovery for all the USB−PERSIST−enabled child devices; the others will be disconnected​.

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