pci_request_regions_exclusive (9) Linux Manual Page
pci_request_regions_exclusive – Reserved PCI I/O and memory resources
Synopsis
int pci_request_regions_exclusive(struct pci_dev *pdev, const char *res_name);Arguments
pdev
-
- PCI device whose resources are to be reserved
res_name
- Name to be associated with resource.
Description
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.
pci_request_regions_exclusive will mark the region so that /dev/mem and the sysfs MMIO access will not be allowed.
Returns 0 on success, or EBUSY on error. A warning message is also printed on failure.