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path: root/drivers/pci/pci.c
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Diffstat (limited to 'drivers/pci/pci.c')
-rw-r--r--drivers/pci/pci.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index e3efe6b19ee7..6d6120007af4 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1540,16 +1540,21 @@ void pci_release_region(struct pci_dev *pdev, int bar)
}
/**
- * pci_request_region - Reserved PCI I/O and memory resource
+ * __pci_request_region - Reserved PCI I/O and memory resource
* @pdev: PCI device whose resources are to be reserved
* @bar: BAR to be reserved
* @res_name: Name to be associated with resource.
+ * @exclusive: whether the region access is exclusive or not
*
* 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.
*
+ * If @exclusive is set, then the region is marked so that userspace
+ * is explicitly not allowed to map the resource via /dev/mem or
+ * sysfs MMIO access.
+ *
* Returns 0 on success, or %EBUSY on error. A warning
* message is also printed on failure.
*/
@@ -1588,12 +1593,12 @@ err_out:
}
/**
- * pci_request_region - Reserved PCI I/O and memory resource
+ * pci_request_region - Reserve PCI I/O and memory resource
* @pdev: PCI device whose resources are to be reserved
* @bar: BAR to be reserved
- * @res_name: Name to be associated with resource.
+ * @res_name: Name to be associated with resource
*
- * Mark the PCI region associated with PCI device @pdev BR @bar as
+ * Mark the PCI region associated with PCI device @pdev BAR @bar as
* being reserved by owner @res_name. Do not access any
* address inside the PCI regions unless this call returns
* successfully.