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Date: Sun, 7 Feb 2016 21:52:24 +0100 From: Nikolay Aleksandrov <razor@...ckwall.org> To: netdev@...r.kernel.org Cc: mst@...hat.com, roopa@...ulusnetworks.com, davem@...emloft.net, Nikolay Aleksandrov <nikolay@...ulusnetworks.com> Subject: [PATCH net-next 2/2] virtio_net: validate ethtool port setting and explain the user validation From: Nikolay Aleksandrov <nikolay@...ulusnetworks.com> We should validate the port setting that we got from the user and check if it's what we've set it to (PORT_OTHER), also add explanation that ignoring advertising is good as long as we don't have autonegotiation. Signed-off-by: Nikolay Aleksandrov <nikolay@...ulusnetworks.com> --- drivers/net/virtio_net.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index c9fd52a8e6ec..fb0eae42bf39 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -1386,11 +1386,13 @@ static bool virtnet_validate_ethtool_cmd(const struct ethtool_cmd *cmd) struct ethtool_cmd diff1 = *cmd; struct ethtool_cmd diff2 = {}; - /* advertising and cmd are usually set, ignore port because we set it */ + /* cmd is always set so we need to clear it, validate the port type + * and also without autonegotiation we can ignore advertising + */ ethtool_cmd_speed_set(&diff1, 0); + diff2.port = PORT_OTHER; diff1.advertising = 0; diff1.duplex = 0; - diff1.port = 0; diff1.cmd = 0; return !memcmp(&diff1, &diff2, sizeof(diff1)); -- 2.4.3
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