Hello.
On 3/16/2016 12:04 AM, Aaron Conole wrote:
This patch checks the feature bit for the VIRTIO_NET_F_MTU feature. If it
exists, read the advised MTU and use it.
No proper error handling is provided for the case where a user changes the
negotiated MTU. A future commit will add proper error handling. Instead, a
warning is emitted if the guest changes the device MTU after previously
being given advice.
Signed-off-by: Aaron Conole <aconole@xxxxxxxxxx>
---
v2:
* Whitespace cleanup in the last hunk
* Code style change around the pr_warn
* Additional test for mtu change before printing warning
drivers/net/virtio_net.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 767ab11..429fe01 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
[...]
@@ -1390,8 +1391,11 @@ static const struct ethtool_ops virtnet_ethtool_ops = {
static int virtnet_change_mtu(struct net_device *dev, int new_mtu)
{
+ struct virtnet_info *vi = netdev_priv(dev);
if (new_mtu < MIN_MTU || new_mtu > MAX_MTU)
return -EINVAL;
+ if ((vi->negotiated_mtu) && (dev->mtu != new_mtu))
Inner parens not needed, please be consistent with the code above.
[...]
MBR, Sergei
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