[PATCH v3 1/2] virtio-net: Describe dev cfg fields read only

[Parav Pandit <parav@nvidia.com>]

Device configuration fields are read only. Avoid duplicating this
description for multiple fields.

Instead describe it one time and do it in the driver requirements
section.

Fixes: https://github.com/oasis-tcs/virtio-spec/issues/161
Signed-off-by: Parav Pandit <parav@nvidia.com>
---
changelog:
v2->v3:
- split as new patch
---
 device-types/net/description.tex | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/device-types/net/description.tex b/device-types/net/description.tex
index a197e1a..81e1135 100644
--- a/device-types/net/description.tex
+++ b/device-types/net/description.tex
@@ -156,10 +156,10 @@ \subsubsection{Legacy Interface: Feature bits}\label{sec:Device Types / Network
 \subsection{Device configuration layout}\label{sec:Device Types / Network Device / Device configuration layout}
 \label{sec:Device Types / Block Device / Feature bits / Device configuration layout}
 
-Device configuration fields are listed below, they are read-only for a driver. The \field{mac} address field
+Device configuration fields are listed below. The \field{mac} address field
 always exists (though is only valid if VIRTIO_NET_F_MAC is set), and
 \field{status} only exists if VIRTIO_NET_F_STATUS is set. Two
-read-only bits (for the driver) are currently defined for the status field:
+bits (for the driver) are currently defined for the status field:
 VIRTIO_NET_S_LINK_UP and VIRTIO_NET_S_ANNOUNCE.
 
 \begin{lstlisting}
@@ -167,14 +167,14 @@ \subsection{Device configuration layout}\label{sec:Device Types / Network Device
 #define VIRTIO_NET_S_ANNOUNCE    2
 \end{lstlisting}
 
-The following driver-read-only field, \field{max_virtqueue_pairs} only exists if
+The following field, \field{max_virtqueue_pairs} only exists if
 VIRTIO_NET_F_MQ or VIRTIO_NET_F_RSS is set. This field specifies the maximum number
 of each of transmit and receive virtqueues (receiveq1\ldots receiveqN
 and transmitq1\ldots transmitqN respectively) that can be configured once at least one of these features
 is negotiated.
 
-The following driver-read-only field, \field{mtu} only exists if
-VIRTIO_NET_F_MTU is set. This field specifies the maximum MTU for the driver to
+The following field, \field{mtu} only exists if VIRTIO_NET_F_MTU
+is set. This field specifies the maximum MTU for the driver to
 use.
 
 The following two fields, \field{speed} and \field{duplex}, only
@@ -261,6 +261,8 @@ \subsection{Device configuration layout}\label{sec:Device Types / Network Device
 
 \drivernormative{\subsubsection}{Device configuration layout}{Device Types / Network Device / Device configuration layout}
 
+All the device configuration fields are read-only for the driver.
+
 A driver SHOULD negotiate VIRTIO_NET_F_MAC if the device offers it.
 If the driver negotiates the VIRTIO_NET_F_MAC feature, the driver MUST set
 the physical address of the NIC to \field{mac}.  Otherwise, it SHOULD
-- 
2.26.2