pci_request_regions (9) - Linux Manuals
pci_request_regions: Reserved PCI I/O and memory resources
pci_request_regions - Reserved PCI I/O and memory resources
int pci_request_regions(struct pci_dev
* pdev, const char * res_name);
- PCI device whose resources are to be reserved
- Name to be associated with resource.
Mark all PCI regions associated with PCI device pdev as being reserved by owner res_name. Do not access any address inside the PCI regions unless this call returns successfully.