1 files changed, 6 insertions, 2 deletions

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index ab36fb34ed01..4fa4c9ff04ae 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -3000,7 +3000,7 @@
                                 or a set of devices (<pci_dev>). These are
                                 specified in one of the following formats:
 
-                                [<domain>:]<bus>:<device>.<func>
+                                [<domain>:]<bus>:<dev>.<func>[/<dev>.<func>]*
                                 pci:<vendor>:<device>[:<subvendor>:<subdevice>]
 
                                 Note: the first format specifies a PCI
@@ -3009,7 +3009,11 @@
                                 firmware changes, or due to changes caused
                                 by other kernel parameters. If the
                                 domain is left unspecified, it is
-                                taken to be zero. The second format
+                                taken to be zero. Optionally, a path
+                                to a device through multiple device/function
+                                addresses can be specified after the base
+                                address (this is more robust against
+                                renumbering issues).  The second format
                                 selects devices using IDs from the
                                 configuration space which may match multiple
                                 devices in the system.