---
title: Abort
framework: usbdriverkit
role: symbol
role_heading: Instance Method
path: usbdriverkit/iousbhostpipe/abort
---

# Abort

Aborts all of the pipe’s pending I/O requests.

## Declaration

```occ
virtual kern_return_t Abort(IOOptionBits options, kern_return_t withError, IOService *forClient);
```

## Parameters

- `options`: Options for how to abort the requests. For a list of possible values, see doc://com.apple.usbdriverkit/documentation/USBDriverKit/IOUSBAbortOptions.
- `withError`: The error value to report for each request. Specify kIOReturnAborted for this parameter.
- `forClient`: The service that initiated the requests. Specify a non NULL value for this parameter only for pipes associated with a control endpoint; specify NULL for other endpoint types. For a control endpoint, you can also specify NULL to abort all requests.

## Return Value

Return Value kIOReturnSuccess on success, or another value if an error occurs. See Error Codes.

## Discussion

Discussion If the options argument includes kAbortSynchronous, this method blocks all new I/O requests except those submitted by an aborted completion routine.

## See Also

### Aborting I/O Requests

- [IOUSBAbortOptions](usbdriverkit/iousbabortoptions.md)