PCI: Check dynids driver_data value for validity

[linux-2.6-omap-h63xx.git] / Documentation / PCI / pci.txt

diff --git a/Documentation/PCI/pci.txt b/Documentation/PCI/pci.txt
index 8d4dc6250c582821ccca5b89127833e2b14bd4ee..fd4907a2968cb3fab71e92286c24da0244dcfcae 100644 (file)
--- a/Documentation/PCI/pci.txt
+++ b/Documentation/PCI/pci.txt
@@ -163,6 +163,10 @@ need pass only as many optional fields as necessary:
        o class and classmask fields default to 0
        o driver_data defaults to 0UL.
 
+Note that driver_data must match the value used by any of the pci_device_id
+entries defined in the driver. This makes the driver_data field mandatory
+if all the pci_device_id entries have a non-zero driver_data value.
+
 Once added, the driver probe routine will be invoked for any unclaimed
 PCI devices listed in its (newly updated) pci_ids list.