pci_release_region(9) centos man page | unix.com

PCI_RELEASE_REGION(9)						Hardware Interfaces					     PCI_RELEASE_REGION(9)

NAME
       pci_release_region - Release a PCI bar

SYNOPSIS
       void pci_release_region(struct pci_dev * pdev, int bar);

ARGUMENTS
       pdev
	   PCI device whose resources were previously reserved by pci_request_region

       bar
	   BAR to release

DESCRIPTION
       Releases the PCI I/O and memory resources previously reserved by a successful call to pci_request_region. Call this function only after all
       use of the PCI regions has ceased.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						     PCI_RELEASE_REGION(9)