提交 82c3aca6 编写于 作者: M Michael S. Tsirkin 提交者: Roland Dreier

IPoIB/cm: Fix interoperability when MTU doesn't match

IPoIB connected mode currently rejects a connection request unless the
supported MTU is >= the local netdevice MTU. This breaks
interoperability with implementations that might have tweaked
IPOIB_CM_MTU, and there's real no longer a reason to do so: this test
is just a leftover from when we did not tweak MTU per-connection.  Fix
this by making the test as permissive as possible.
Signed-off-by: NMichael S. Tsirkin <mst@dev.mellanox.co.il>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
上级 3ec7393a
......@@ -759,9 +759,9 @@ static int ipoib_cm_rep_handler(struct ib_cm_id *cm_id, struct ib_cm_event *even
p->mtu = be32_to_cpu(data->mtu);
if (p->mtu < priv->dev->mtu + IPOIB_ENCAP_LEN) {
ipoib_warn(priv, "Rejecting connection: mtu %d < device mtu %d + 4\n",
p->mtu, priv->dev->mtu);
if (p->mtu <= IPOIB_ENCAP_LEN) {
ipoib_warn(priv, "Rejecting connection: mtu %d <= %d\n",
p->mtu, IPOIB_ENCAP_LEN);
return -EINVAL;
}
......
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