pci_request_region_exclusive (9) - Linux Man Pages
pci_request_region_exclusive: Reserved PCI I/O and memory resource
pci_request_region_exclusive - Reserved PCI I/O and memory resource
int pci_request_region_exclusive(struct pci_dev
*pdev, int bar, const char *res_name);
- PCI device whose resources are to be reserved
- BAR to be reserved
- Name to be associated with resource.
Mark the PCI region associated with PCI device pdev BR bar as being reserved by owner res_name. Do not access any address inside the PCI regions unless this call returns successfully.
Returns 0 on success, or EBUSY on error. A warning message is also printed on failure.