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: Michael S. Tsirkin <mst@dev.mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
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@ -759,9 +759,9 @@ static int ipoib_cm_rep_handler(struct ib_cm_id *cm_id, struct ib_cm_event *even
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p->mtu = be32_to_cpu(data->mtu);
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if (p->mtu < priv->dev->mtu + IPOIB_ENCAP_LEN) {
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ipoib_warn(priv, "Rejecting connection: mtu %d < device mtu %d + 4\n",
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p->mtu, priv->dev->mtu);
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if (p->mtu <= IPOIB_ENCAP_LEN) {
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ipoib_warn(priv, "Rejecting connection: mtu %d <= %d\n",
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p->mtu, IPOIB_ENCAP_LEN);
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return -EINVAL;
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}
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