netdev_has_upper_dev
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## Name

netdev_has_upper_dev — Check if device is linked to an upper device

## Synopsis

`bool netdev_has_upper_dev (` | struct net_device * dev,
| struct net_device * upper_dev`)`;

## Arguments

`dev`

  device

`upper_dev`

  upper device to check

## Description

Find out if a device is linked to specified upper device and return true in case it is. Note that this checks only immediate upper device, not through a complete stack of devices. The caller must hold the RTNL lock.

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