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RDMA/cma: Fix synchronization with device removal in cma_iw_handler 

The cma_iw_handler needs to validate the state of the rdma_cm_id before
processing a new connection request to ensure that a device removal is
not already being processed for the same rdma_cm_id.  Without the state
check, the user can receive simultaneous callbacks for the same cm_id, or
a callback after they've destroyed the cm_id.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Sean Hefty 2007-05-07 11:49:12 -07:00 committed by Roland Dreier
parent 8aa08602bd
commit be65f086f2
1 changed files with 3 additions and 2 deletions
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5
drivers/infiniband/core/cma.c
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@ -1183,9 +1183,10 @@ static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
struct sockaddr_in *sin;
int ret = 0;
memset(&event, 0, sizeof event);
atomic_inc(&id_priv->dev_remove);
if (cma_disable_remove(id_priv, CMA_CONNECT))
return 0;
memset(&event, 0, sizeof event);
switch (iw_event->event) {
case IW_CM_EVENT_CLOSE:
event.event = RDMA_CM_EVENT_DISCONNECTED;