---
name: "pci_block_user_cfg_access"
section: "9"
platform: "linux"
package: "linux-manual-3.2"
version: "3.2.78-1"
release: "Debian 7 (Wheezy)"
platforms: ["linux"]
url: "https://new.carta.tech/pci_block_user_cfg_access"
---

# pci\_block\_user\_cfg\_access(9)

Block userspace PCI config reads/writes

## NAME

pci\_block\_user\_cfg\_access - Block userspace PCI config reads/writes

## SYNOPSIS

**void pci\_block\_user\_cfg\_access(struct pci\_dev \*** *dev***);**

## ARGUMENTS

*dev*

pci device struct

## DESCRIPTION

When user access is blocked, any reads or writes to config space will sleep until access is unblocked again. We don't allow nesting of block/unblock calls.

## COPYRIGHT