[PATCH 1/1] Documentation: hyperv: Update documentation for sending VMBus packets

[Michael Kelley <mhkelley58@gmail.com>]

The functions for sending VMBus packets have been simplified.
vmbus_sendpacket_mpb_desc() can target multiple ranges, and
vmbus_sendpacket_pagebuffer() has been removed. Update the
documentation accordingly.

Fixes: 45a442fe369e ("Drivers: hv: vmbus: Remove vmbus_sendpacket_pagebuffer()")
Cc: stable@vger.kernel.org
Signed-off-by: Michael Kelley <mhklinux@outlook.com>
---
The Fixes: tag reflects the code change that was made. The
documentation update should have been included with the
original code change.

 Documentation/virt/hyperv/vmbus.rst | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/Documentation/virt/hyperv/vmbus.rst b/Documentation/virt/hyperv/vmbus.rst
index 654bb4849972..77a437969b49 100644
--- a/Documentation/virt/hyperv/vmbus.rst
+++ b/Documentation/virt/hyperv/vmbus.rst
@@ -137,18 +137,13 @@ control message contains a list of GPAs that describe the data
 buffer.  For example, the storvsc driver uses this approach to
 specify the data buffers to/from which disk I/O is done.
 
-Three functions exist to send VMBus channel messages:
+Two functions exist to send VMBus channel messages:
 
 1. vmbus_sendpacket():  Control-only messages and messages with
    embedded data -- no GPAs
-2. vmbus_sendpacket_pagebuffer(): Message with list of GPAs
-   identifying data to transfer.  An offset and length is
-   associated with each GPA so that multiple discontinuous areas
-   of guest memory can be targeted.
-3. vmbus_sendpacket_mpb_desc(): Message with list of GPAs
-   identifying data to transfer.  A single offset and length is
-   associated with a list of GPAs.  The GPAs must describe a
-   single logical area of guest memory to be targeted.
+2. vmbus_sendpacket_mpb_desc(): Message with one or more data ranges
+   to target. Each range consists of a single offset and length plus
+   a list of GPAs that describe a logical area of guest memory.
 
 Historically, Linux guests have trusted Hyper-V to send well-formed
 and valid messages, and Linux drivers for synthetic devices did not
-- 
2.25.1