pci_cfg_access_lock(9) centos man page | unix.com

PCI_CFG_ACCESS_LOCK(9)						Hardware Interfaces					    PCI_CFG_ACCESS_LOCK(9)

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
Kernel Hackers Manual 3.10					     June 2014						    PCI_CFG_ACCESS_LOCK(9)