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[PATCH] IB/cm: drop REQ when out of memory 

If a user of the IB CM returns -ENOMEM from their connection callback, simply
drop the incoming REQ - do not attempt to send a reject.  This should allow
the sender to retry the request.

Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Cc: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Michael S. Tsirkin 2006-07-14 00:23:52 -07:00 committed by Linus Torvalds
parent 0964d91618
commit 04c335430f
1 changed files with 18 additions and 3 deletions
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21
drivers/infiniband/core/cm.c
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@ -701,7 +701,7 @@ static void cm_reset_to_idle(struct cm_id_private *cm_id_priv)
}
}
void ib_destroy_cm_id(struct ib_cm_id *cm_id)
static void cm_destroy_id(struct ib_cm_id *cm_id, int err)
{
struct cm_id_private *cm_id_priv;
struct cm_work *work;
@ -735,12 +735,22 @@ retest:
sizeof cm_id_priv->av.port->cm_dev->ca_guid,
NULL, 0);
break;
case IB_CM_REQ_RCVD:
if (err == -ENOMEM) {
/* Do not reject to allow future retries. */
cm_reset_to_idle(cm_id_priv);
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
} else {
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED,
NULL, 0, NULL, 0);
}
break;
case IB_CM_MRA_REQ_RCVD:
case IB_CM_REP_SENT:
case IB_CM_MRA_REP_RCVD:
ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
/* Fall through */
case IB_CM_REQ_RCVD:
case IB_CM_MRA_REQ_SENT:
case IB_CM_REP_RCVD:
case IB_CM_MRA_REP_SENT:
@ -775,6 +785,11 @@ retest:
kfree(cm_id_priv->private_data);
kfree(cm_id_priv);
}
void ib_destroy_cm_id(struct ib_cm_id *cm_id)
{
cm_destroy_id(cm_id, 0);
}
EXPORT_SYMBOL(ib_destroy_cm_id);
int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask,
@ -1163,7 +1178,7 @@ static void cm_process_work(struct cm_id_private *cm_id_priv,
}
cm_deref_id(cm_id_priv);
if (ret)
ib_destroy_cm_id(&cm_id_priv->id);
cm_destroy_id(&cm_id_priv->id, ret);
}
static void cm_format_mra(struct cm_mra_msg *mra_msg,