Bind/unbind support was added by commit 381b803a68deb28
("vmbus: add support for dynamic device id's").

Signed-off-by: Stephen Hemminger <sthem...@microsoft.com>
---
 Documentation/ABI/stable/sysfs-bus-vmbus | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/Documentation/ABI/stable/sysfs-bus-vmbus 
b/Documentation/ABI/stable/sysfs-bus-vmbus
index cc4beab180ff..183d14420152 100644
--- a/Documentation/ABI/stable/sysfs-bus-vmbus
+++ b/Documentation/ABI/stable/sysfs-bus-vmbus
@@ -41,3 +41,27 @@ KernelVersion:       4.5
 Contact:       K. Y. Srinivasan <k...@microsoft.com>
 Description:   The 16 bit vendor ID of the device
 Users:         tools/hv/lsvmbus and user level RDMA libraries
+
+What:          /sys/bus/vmbus/drivers/.../bind
+Date:          Nov. 2015
+KernelVersion: 4.9
+Contact:       Stephen Hemminger <sthem...@microsoft.com>
+Description:
+               Writing a device location to this file will cause
+               the driver to attempt to bind to the device found at
+               this location.  This is useful for overriding default
+               bindings.  The format is UUID format similar to
+               /sys/bus/vmbus/devices/. For example:
+               # echo f8615163-df3e-46c5-913f-f2d2f965ed0e > 
/sys/bus/pci/drivers/foo/bind
+
+What:          /sys/bus/vmbus/drivers/.../unbind
+Date:          Nov. 2015
+KernelVersion: 4.9
+Contact:       Stephen Hemminger <sthem...@microsoft.com>
+Description:
+               Writing a device location to this file will cause the
+               driver to attempt to unbind from the device found at
+               this location.  This may be useful when overriding default
+               bindings. The format is UUID format similar to
+               /sys/bus/vmbus/devices/. For example:
+               # echo f8615163-df3e-46c5-913f-f2d2f965ed0e > 
/sys/bus/pci/drivers/foo/unbind
-- 
2.11.0

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