Reserved pci i/o and memory resources
int pci_request_regions(struct pci_dev * pdev, const char * res_name);
pdev
PCI device whose resources are to be reserved
res_name
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.
Returns 0 on success, or EBUSY on error. A warning message is also printed on failure.