---
name: "pci_cfg_access_lock"
section: "9"
platform: "linux"
package: "linux-manual-4.9"
version: "4.9.228-1"
release: "Debian 9 (Stretch)"
platforms: ["linux"]
url: "https://new.carta.tech/pci_cfg_access_lock"
---

# pci\_cfg\_access\_lock(9)

Lock PCI config reads/writes

## NAME

pci\_cfg\_access\_lock - Lock PCI config reads/writes

## SYNOPSIS

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

## ARGUMENTS

*dev*

pci device struct

## DESCRIPTION

When access is locked, any userspace reads or writes to config space and concurrent lock requests will sleep until access is allowed via pci\_cfg\_access\_unlocked again.

## COPYRIGHT