diff options
| author | Sean Hefty <sean.hefty@intel.com> | 2005-11-30 19:01:13 +0100 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2005-11-30 19:01:13 +0100 |
| commit | de1bb1a64c29bae4f5330c70bd1dc6a62954c9f4 (patch) | |
| tree | 5586b640073f5e344482246cbc4f3fa8d5662f55 /drivers/infiniband | |
| parent | IB/cm: correct reported reject code (diff) | |
| download | linux-de1bb1a64c29bae4f5330c70bd1dc6a62954c9f4.tar.xz linux-de1bb1a64c29bae4f5330c70bd1dc6a62954c9f4.zip | |
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>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/core/cm.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c index 1fe21865d1f2..3a611fe5497e 100644 --- a/drivers/infiniband/core/cm.c +++ b/drivers/infiniband/core/cm.c @@ -308,10 +308,11 @@ static int cm_alloc_id(struct cm_id_private *cm_id_priv) { unsigned long flags; int ret; + static int next_id; do { spin_lock_irqsave(&cm.lock, flags); - ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, 1, + ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, next_id++, (__force int *) &cm_id_priv->id.local_id); spin_unlock_irqrestore(&cm.lock, flags); } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) ); |