forked from Minki/linux
IB/cm: avoid reusing local ID
Use an increasing local ID to avoid re-using identifiers while messages may still be outstanding on the old ID. Without this, a quick connect-disconnect-connect sequence can fail by matching messages for the new connection with the old connection. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
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@ -308,10 +308,11 @@ static int cm_alloc_id(struct cm_id_private *cm_id_priv)
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{
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unsigned long flags;
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int ret;
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static int next_id;
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do {
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spin_lock_irqsave(&cm.lock, flags);
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ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, 1,
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ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, next_id++,
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(__force int *) &cm_id_priv->id.local_id);
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spin_unlock_irqrestore(&cm.lock, flags);
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} while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) );
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