---
title: validFIFODepth
framework: kernel
role: symbol
role_heading: Instance Method
path: kernel/iodmacontroller/1485765-validfifodepth
---

# validFIFODepth

## Declaration

```occ
virtual IOByteCount validFIFODepth(UInt32 dmaIndex, IOByteCount depth, IODirection direction);
```