usb_hub_find_child
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## Name

usb_hub_find_child — Get the pointer of child device attached to the port which is specified by `port1`.

## Synopsis

`struct usb_device * usb_hub_find_child (` | struct usb_device * hdev,
| int port1`)`;

## Arguments

`hdev`

  USB device belonging to the usb hub

`port1`

  port num to indicate which port the child device is attached to.

## Description

USB drivers call this function to get hub's child device pointer.

## Return

`NULL` if input param is invalid and child's usb_device pointer if non-NULL.

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