[PATCH 1/3] iw_cm: free cm_id resources on the last deref

[Sagi Grimberg]

> Remove the complicated logic to free the cm_id resources in iw_cm event
> handlers vs when an application thread destroys the device.  I'm not sure
> why this code was written, but simply allowing the last deref to free
> the memory is cleaner.  It also prevents a deadlock when applications
> try to destroy cm_id's in their cm event handler function.

The description here is misleading. we can never destroy the cm_id
inside the cm_id handler. Also, I don't think the deadlock was on cm_id
removal but rather on the qp referenced by the cm_id. I think the change
log can be improved.

The patch looks fine to me.