[PATCH] virtio-net: clarify error handling for coalescing

["Michael S. Tsirkin" <mst@redhat.com>]

This is not a huge deal since it's a SHOULD anyway,
so make the new requirement SHOULD too.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 device-types/net/description.tex | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/device-types/net/description.tex b/device-types/net/description.tex
index aff5e08..d1d25fe 100644
--- a/device-types/net/description.tex
+++ b/device-types/net/description.tex
@@ -1792,7 +1792,11 @@ \subsubsection{Control Virtqueue}\label{sec:Device Types / Network Device / Devi
 
 The device MUST ignore \field{reserved}.
 
-The device SHOULD respond to VIRTIO_NET_CTRL_NOTF_COAL_TX_SET and VIRTIO_NET_CTRL_NOTF_COAL_RX_SET commands with VIRTIO_NET_ERR if it was not able to change the parameters.
+The device SHOULD respond to VIRTIO_NET_CTRL_NOTF_COAL_TX_SET and
+VIRTIO_NET_CTRL_NOTF_COAL_RX_SET commands with VIRTIO_NET_ERR if
+it was not able to change coalescing parameters. In this case,
+the parameters SHOULD remain unchanged, for all VQs.
+
 
 The device MUST respond to the VIRTIO_NET_CTRL_NOTF_COAL_VQ_SET command with VIRTIO_NET_ERR if it was not able to change the parameters.
 
-- 
MST